Indy LAX or J-heads?

I can see that. Lots to do on a conversion. A stroker 3G ought to be pretty bad ***.

In keeping with the threads theme, LOL, this is a little off topic. However, a good aluminum head will toast a iron head on the big end. Pound for pound, no pun intended, a head like these exceed there iron counter parts.

Something like these heads can be used in the street very easily and with the OP’s first post combo as well with what I think would be a little help, more lift. Since they moved air REALLY WELL to .650 on a 4.125 bore, where the flow curve flattened a little and went turbulent. Not that it is a big bummer or anything horrible.

For everyone else that may not know, a W5 is basically a aluminum W2 with rectangular ports. These two heads are still in the replacement head category meaning no extra head bolts or exotic valve gear. But still expensive vs OE replacement material.

Semi exotic? LOL