Ford Muscle Cars Tech Forum banner
1 - 11 of 11 Posts

·
Registered
Joined
·
825 Posts
Discussion Starter · #5 ·
Cain how much extra work was the 408 on a 69w is there extra clearance issues? which kit did you use? also what cam and heads did you use? Im hoping to build one soon and haven't seen alot of info doing a 69. Thanks
 

·
Premium Member
Joined
·
814 Posts
I wouldn't say there was much extra work involved. My machinist did shave a bit off the tops of my pistons to compensate for the deck height of the early block. I'm running SRP pistons part#206062, 6.250" 4340 forged SCAT H-beam rods, and a 4340 forged SCAT crank. If I remember correctly the pistons have got a 16cc dish now. I think they were 19cc stock. My engine is internally balanced also. I didn't have any unusual clearance issues. For heads I'm running AFR 205's. I had to get them surfaced because they weren't even close to flat when AFR sent them to me. They've got 56cc chambers now. Current cam is a comp cams solid roller part# 35-772-8. 248/254 @ .050 .614 .621 110ls. Compression is 11.4 to 1 and I run on the street with 92 octane. Hope this helps. Here's a pic.


_________________
Look at my page

<font size=-1>[ This Message was edited by: Cain on 2/13/05 12:39pm ]</font>
 

·
Registered
Joined
·
5 Posts
I have a 69 351 stroked to 427 that I put into my 62 falcon. No problems except that the machine shop used far too much clearance on the pistons and it uses oil. Noisy too when starting. My fault, I should have specified .003.

I have almost an identical set up including the AFR heads and camshaft. I have used desktop dyno and desktop drag to re-evaluate engine modifications and the programs indicate greater volumeteric efficiency (98.7% and lower et 11.07 hypothetical) by going to a 3.85" stroke. It flys against common logic but I have built with the aid of the computer before and it can be very close.
 

·
Registered
Joined
·
5,525 Posts
Mine is a '69 block. Victor Jr fits fine. Super Victor fits fine. I milled .007 off the decks. Everything else is the same except for the -.020 deck height. That can get you into some issues especially with stroker kits. Most are designed for 9.50 or 9.49 blocks. I did up a 408 but had to go with longer rods and shorter pistons to arrive at 9.465 stack height (piston CH + rod length + half stroke). It came out perfect on a 9.48 block-the pistons were about .005 in the hole. Basically it's 331 pistons with 6.300 rods.
 

·
Registered
Joined
·
2 Posts
Mine is a '69 block. Victor Jr fits fine. Super Victor fits fine. I milled .007 off the decks. Everything else is the same except for the -.020 deck height. That can get you into some issues especially with stroker kits. Most are designed for 9.50 or 9.49 blocks. I did up a 408 but had to go with longer rods and shorter pistons to arrive at 9.465 stack height (piston CH + rod length + half stroke). It came out perfect on a 9.48 block-the pistons were about .005 in the hole. Basically it's 331 pistons with 6.300 rods.
Mine was zero decked giving it a 9.2 deck height. I need an intake for street. Dual plane manifold. Any ideas ?
 
1 - 11 of 11 Posts
Top