[BHRS]

Goto Summit Racing and look up stroker kits, they will include all the parts needed to convert the 350 to a 383.

If the heads are shot, how is the rest of the motor? Have you pulled the motor and checked the cylinders?

I had a what I thought was a nice 350 once that some dipstick forgot to put anti-freeze in and the block was cracked. Make sure the block is good before ordering parts...