340 CYLINDER HEADS

For a brief while, I ran a Comp 282S solid lifter cam in my 340. Kept having to adjust the valves which I figured was due to lobe wear from my not having broken it in correctly. Anyway, I said the Hell with it and swapped in a Mopar Performance 761 hydraulic cam, 270/272 duration, .450/.455 lift, 110 LSA. Mopar's specs for duration at .050 are ridiculously wrong; at .050, I'm pretty sure this cam is 224 on the exhaust and 2-4 degrees less on the intake. I have no doubt that there are better cams out there today, but this one has given me no trouble at all for over 20 years, and I don't think replacing it would gain enough to be worth the trouble. Good all around power, and it will rev to six grand.

Anyway, just FYI, with RPM Air Gap, 750 Holley vacuum secondary, Edelbrock 65 cc heads, TRW forged pistons that stick out of the block .018-.025 or so at TDC, FelPro .039 head gaskets, cranking compression is 165.

Also, TTI headers, 2.5 inch mandrel bent X-pipe exhaust, four speed with 3.09 low gear, 3.23 rear gears.