[G450X]

I need some technical advice on early versus late 3.0 SSI applications.

I have an '82 3.0 SC which I plan on rebuilding using early large port ('78-'79) heads. I think the early 3.0 SSI's are thin flange with no OX sensor bung. I currently run the proper SSI's for late 3.0 (thick flange with OX sensor bung).

Will the late SSI's (forget the OX bung, I can seal it if necessary) thick flange that insert into the heads work on an early large port head? Will the flange insert into the early heads like the late heads?

Do I need to put longer head studs in for clearance?

...or do I just need to locate a thin flange set, sell mine, and be done with it?

Thanks