True I do need to get the real numbers. Block was flat filed using a machinists level and file. The compression rating numbers were from the speed pro advertisement for the pistons. They are the hyper flat tops with four large eyebrows. Shows compression on a 68-72 block with 58.5 cc heads at 8.96-1. This is my first attempt on a complete rebuild so my learning curve is pretty steep.

 

After many delays mistakes and frustrations my motor is done. With a Holley 600 just had it tuned on a dynojet. Final results 273 rwhp at 4800 rpm 313 tq at 3600 rpm. Peak power is at higher rpm than I expected but I had the heads ported and bowl blended. I would have been happy 40 hp and tq less. I'm thrilled. It screams from 1800-5000 rpm. Btw turns out the rear is 308 so I will be regearing it asap

 

Good work. What did the compression ratio end up at? Yes 3.55 or better gears will work much better with the powerband you got.

 

Thank you for your advice . You were a big help. I ended up 9.3-1 when I measured it out. I'm running 93 octone with no detination problems. I'm definitely going to move to a 3.55 gear asap

 

Forgot to add. I also ditched the 3.03 and went with a c4 with a shift kit

 

Check that cam for runout in three spots. I've had trouble with Howards in the past. One was out .003 on a end. No way that would have even went in. They do fix them for free but you get stuck paying for sending it too them.

 

Thanks for the heads up on that and funny you should bring it up. The Howard's cam gave me some problems so I ended up pulling it and replacing it with a edelbrock cam with matching specs

 

Hey my son and I have a 65 short bed and doing a bunch of work to including putting a 68 302 in it. Question is what year headers did you order to fit? The motor came with headers and was going in a mustang I believe; the drivers side header won’t go due to it hitting the firewall. Wondering if you are running 69 F100 headers? Thanks