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  #136  
Old 02-06-2018, 11:25 PM
69JavelinMan 69JavelinMan is offline
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Name: Darren
Out she comes:



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  #137  
Old 03-06-2018, 11:53 AM
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chevguy chevguy is offline
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Best way to go if your going to wail on it. Give it some decent compression(minimum 11-1), some decent slugs and a nice cam/springs. Not sure on what the heads look like but if possible give them a tickle. 11’s at least here you come ��
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  #138  
Old 04-06-2018, 12:12 PM
69JavelinMan 69JavelinMan is offline
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Looking to do some mods to the crank so that a standard Torqueflite converter with more stall will fit rather than the custom built one on there at the moment.

May get a compression boost with new pistons 10.5:1, but the budget doesn't really stretch to decent slugs, which are not readily available for my bore size, so will probably have to be factory style cast jobs. Resize rods with some decent bolts and a fresh set of bearings.
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  #139  
Old 04-06-2018, 04:08 PM
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chevguy chevguy is offline
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Quote:
Originally Posted by 69JavelinMan View Post
Looking to do some mods to the crank so that a standard Torqueflite converter with more stall will fit rather than the custom built one on there at the moment.

May get a compression boost with new pistons 10.5:1, but the budget doesn't really stretch to decent slugs, which are not readily available for my bore size, so will probably have to be factory style cast jobs. Resize rods with some decent bolts and a fresh set of bearings.
No hypertectic pistons(spelt wrong I know) available? Usually around $500 a set.
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  #140  
Old 04-06-2018, 05:42 PM
69JavelinMan 69JavelinMan is offline
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Nobody makes them, you can get hyper 360 pistons which have a big dish in them, but I want to run the earlier 343 flat tops, that's where the extra compression comes from. The flat tops are only available cast or otherwise forged from Wiseco, but not in the bore size I want.
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  #141  
Old 05-06-2018, 02:16 PM
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chevguy chevguy is offline
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Quote:
Originally Posted by 69JavelinMan View Post
Nobody makes them, you can get hyper 360 pistons which have a big dish in them, but I want to run the earlier 343 flat tops, that's where the extra compression comes from. The flat tops are only available cast or otherwise forged from Wiseco, but not in the bore size I want.
Well that sux. I still think it’s really cool to make something fast though that you can’t buy stuff off the shelf and say “ with this part and that part it should make X power and run this time”. The journey is the fun, hats off
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  #142  
Old 05-06-2018, 03:42 PM
69JavelinMan 69JavelinMan is offline
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Putting the factory 343 flat tops into a 360 AMC motor is probably one of the oldest hot rodding tricks in the book, just a matter of finding the right parts to do it with these days.
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  #143  
Old 06-08-2018, 09:50 PM
69JavelinMan 69JavelinMan is offline
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Things are starting to come together, picked up a pile of parts from the machine shop recently:



Shoestring budget allowed for the following:
Quick hone of the bores, piston to bore clearance is not going to be ideal and will be in the 0.004"-0.005" range, but hopefully ok for the intended use
Supply and fit new cam bearings including test fitting the cam and fixing the bearings so that it turns freely
Fit ARP bolts to factory rods and resize
Press fit pistons
Linishing the crank
Also had my Torker intake refaced to correct corrosion issues and some surface damage that had shown up when I tried to use it previously

I did lash out and have the assembly balanced, probably a good move I'd suggest.



Then it was onto the cleaning process, I didn't have the block hot tanked, so had to break out the trusty screwdriver instead:



Did a bit of gasket matching on the oil supply side of things (top hole was originally round) as well as cleaning up the casting flash on the oil return holes in the valley:



Followed by a lot more scrubbing and cleaning before finally bagging it up ready to start putting bits back in soon:

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  #144  
Old 14-08-2018, 08:41 AM
69JavelinMan 69JavelinMan is offline
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Made a start on assembly, crank installed:



Got 7 pistons in their holes:



Only 7 because I had a bit of a disaster and broke one of the rings:



Looks like I'm going to have to buy another full set, haven't had any luck finding individual rings so far. Think I will even lash out and spend $6 on a proper piston ring installing tool this time.
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  #145  
Old 17-08-2018, 08:05 AM
69JavelinMan 69JavelinMan is offline
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Success, old retired engine builder with a factory unit full of left over stock, sure beats buying another full set:

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  #146  
Old 17-08-2018, 12:04 PM
HQGUY HQGUY is offline
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WOW talk about lucky
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  #147  
Old 25-08-2018, 10:15 AM
69JavelinMan 69JavelinMan is offline
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Quick update, remaining piston installed.

Got the new Milodon timing set out and immediately noticed a problem with the cam gear.



It's supposed to have a slot where the mark is to transfer oil from an oil hole in the front of the cam out to lubricate the timing chain and also the distributor/oil pump drive gears. Easily fixed with the die grinder, but not something you expect to have to do with supposedly high quality parts. Distributor gear failures are a common problem on these engines.



Corrected timing set installed:



I did forget something in the process, so have left a note to make sure I'm not wondering why I have no oil pressure down the track:



Does mean that the timing set needs to come back off, but in the meantime I checked the cam timing, came in at 105 deg ICL installed straight up, which is good enough for me:



Also mounted up a head to check piston to valve clearance, 0.070" on the intake and 0.090" on the exhaust, tight but should have a little more with the real valve springs:



Hopefully get some more done this weekend.
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  #148  
Old 27-08-2018, 09:43 PM
69JavelinMan 69JavelinMan is offline
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One of the major reasons for this engine rebuild was to allow me to modify the crank flange so that I could fit a decent high stall converter.

Thanks to one of the local Mopar guys, one of the missing pieces of the puzzle is now in my possession, a 10" Turbo Action converter for a Mopar 727, on the right next to the old one:



Of course some modification is required to make it fit the AMC 727 application:



Then drill out the flex plate to take the 7/16" converter bolts and Bob's your uncle:

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  #149  
Old 03-09-2018, 01:07 PM
69JavelinMan 69JavelinMan is offline
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Name: Darren
This weekend's installment:

Got those pesky oil galley plugs installed:



Then it was time to break out the die grinder. Decided to use the old intake valley pan as a template for gasket matching the heads:



As you can see there is a bit of material to come out:



And after a bit of work it looks like this:



Finished product, still needs a bit of smoothing, especially further into the ports where the carbide burs that I have won't reach:



Also had a bit of a crack at the bowls behind the valves, mostly just smoothing out, hopefully it's worth something:



Exhaust side, not really much to see here:



Next step is to track down some sanding rolls and smooth everything out a bit more.
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  #150  
Old 10-09-2018, 08:40 AM
69JavelinMan 69JavelinMan is offline
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Name: Darren
Another day on the porting bench:



Hope this is worth the effort amd makes some sort of difference:











Ideally would re-cut the valve seats and install some performance valves, but no time or budget for that, so a quick backyard valve grind and onto the assembly bench:



One down, one to go:

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