Supposedly overcammed works out.....

MOPARoldtimer said

In my 408 with 10.5:1 compression, I'm running a Comp Cams CRS 292H-10 with a 727 TorqueFlite and a 2,200 stall converter.

Total lift: .501. 292 degrees duration at .006 and 244 degrees at .050; .334 lift at .050.

I sure wouldn't want a bigger cam with the automatic and this converter. It is supposed to be a street car! It will barely idle.

Click to expand...

Taking a different and probably more unpopular route here - you are not over cammed. You have either a tuning issue or base engine problem. It should idle like a kitten with that camshaft. I won't dispute that you should get a positive result from a modern convertor - but not because the engine's running the way it should. You'll still have a doggy engine in front of it. If a 4" stroke has less duration than 250° .050 it should idle under 800 easilly and it would work with even a stock low stall convertor. The ones I build get decent mileage in addition to opwer because the convertor is tight.

In regard to the stock lower end -

I agree it will never be built. The problem I see is no piston would work on that "stock" combo shortblock and a cam you would need to run. Even a 7.5:1 piston .125 down will hit a 2.08 valve with a big camshaft. You need some valve pockets - and then you've just upgrade the bottom end.