Quote Originally Posted by billlsbird
Hi Eric, no it's a 4.185 bore & a 3.75 stroke with forged aluminum pistons. Thanks, Bill
With that over-bore it will be very hard to keep head gaskets in it.
My advice would be put in a larger hyd. roller cam or a smaller mech. roller cam.
With the right cam and those heads you will be over the 500 hp area.