What would you build if limited to 372ci - with boost as an option

Newbomb Turk said

lol you know I hate math but I’ll have to run the numbers.

Pulling the numbers out of my arse I’d say a 9.000 deck would be about as tall as you’d want it.

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That's shorter than a small block, that would be unreasonable lol, nearly 1 inch shorter.
The stroke you mentioned 3.100 with a 7.100 rod bbc journals and a 1.320 ch piston would work with a standard deck height block with .010 to deck square.
Fairly lightweight and rev to the moon, put some -1 or bigger heads with a tunnel ram, nitrous and 2 hair dryers.