318 to stock 340 power level questions.

1wild&crazyguy said
to autox,
better head for a bigger motor, yes.
but I don't believe so at this level of 318.

I have a 318 in the shop that has .020 stock pistons, 318 closed chambered '234' truck heads, 340 crane blue print cam w/4* advance, and headers, eddy performer/600 eddy carb.
It runs hard to 6100rpm then turns off like a light switch, but it make great power and breaks tires shifting with a 4 spd, it's my back up motor.

the heads were un touched too.

just keep it simple bro and you'll be good.

So you keep the stock 318 valve sizes on those? If you are not messing with changing the valve sizes, I totally understand just working with the 318 head.

There was talk about changing the 318 heads' valves to 360 size and cutting the valve spring pockets. At that point, I thought there might be other viable options.