That's a big cylinder head for a 540, ..
in general spread port heads like that will "like" a 4.6" bore, . . . and the
manifolds etc designed for them are generally better on large engines
like a 582 or 598", .
If you are going to do this I'd go more towards a 18* head designed
for your engine, ..maybe a cnc ported Brodix 1803 or the new
Edelbrock Big Vic spread port. We are working on our cnc for this
head now.
Curtis