Right now I'm running a 67 440 w/stock flat tops, .070 in the hole, #346 heads with .020 steel head gaskets. Calculates to 9:23-1. Eddy RPM intake, 440 Source distributor w/no vacuum advance, Summit 6401 cam and matching Crane spring. It runs fine on 89 octane w/no quench. It pulls pretty good now, I just want to build something with more oomph and I'm on a tight budget. I have a small block factory hi stall converter behind it and I want to keep my 3:23 gears to cruise. Any suggestions to improve on what I have would be appreciated.
Did you CC a combustion chamber in both heads? If not you should as those heads stock are close to 91.0+ on all the ones I've check. I'm thinking your true measured compression ratio is probaly around 8.5 to 1 or less
Have you jetted the carb. and maxed out the timing curve yet? If not do that also
Little things add up quiclky to making a lot more power
What size and brand carb are you using?
