Which stroker kit for 470" b-engine

I have been saving my pennies for quite some time now and have enough cash to start ordering large parts for my next engine build. I have decided that I want to do a low deck stroker. I have decided on the 470 for two reasons...... If im wrong with this thinking please correct me. I love being educated!!!!!!

1. the 470 is as big as you can go with internal oiling and not pushing the wrist pin into the oil rings.

2. 470 is about as big as you can go and still stay with stock-ish size heads.

I have a set of performer RPM heads on my current 383. They have just minor touch up work and are basically out of the box stock. I dont want to step up to indy heads or the new victor heads just because that is another 2-3k investment when I think i can reach my hp goals with the rpm head.

I am leaning toward the Muscle Motors kits but am open to other opinions. I am looking to make 550-600hp on pump gas with my eddy heads, performer rpm intake and a solid roller cam. I already have the comp cams pro magnum rockers so valve train is up to the task.

Lets hear your input guys.