honestly waht you would gain in HP from compression you would probably lose in flow rate

 

i will have to sleeve the 5.7 block and put a new piston in it before i sell it.

Quik, would you just leave the 317 in it for now?

 

for now yes, they flow good its just with a lower CR your cam choices are somewhat limted. larger cams like high cr but running something small or ot some large would be ideal and still make great power

a stock 241 head should be like 4.8s just given away

 

I'm gonna argue that one....they're within 5% of the flow of a stock 243 or 317 head, and they're REALLY CHEAP, I'd bet that with the restriction caused by our intake manifolds the flow between the 241 and the 317 is almost identical when installed (flow-bench numbers don't count here...try flowing the heads with the intake on and see what happens), because the valve sizes are the same and it's only the port volume that's smaller the 241 heads are going to create more low-end torque than the 243 or 317 heads....and at the rpm where the the 317's come into their best our intake manifolds can't flow enough to keep up with the heads

 

didnt say htey were junk just said they should be given away

 

i will be running a 224/224dur 581/581lift on 112 cam. if i understand it right, this is a small cam for 6.0's??

 

Think of it more as an "appropriate" cam for a 6.0 that a "small" cam, it'll make great power and will still daily drive very well...it'll combine very well with the 241 heads but the truck intake will become a restriction up above 5700rpms or so

I do have to ask why you feel a 6.0 is needed when you already have a 5.7 ??, the 5.7 has been proven to make BIG power very easily. The 6.0 has more room for expansion but you can still get 383cid out of a 3.9" bore and 4" stroke crank....I'm just thinking you might be better off putting the money for a 6.0 into a stroked rotating assembly for the motor you have now and end up with bigger cubes than you would with the stock 6.0

 

the only reason im going to a 6.0 is cause my hidden nitrous system come unvailed friday night when my nut holding my nozzle came loose and went down and busted my piston