My DD 183" L6 has an aluminum 12 port cross-flow head and would pull that car along nicely - it's about 520 hp at the flywheel.
You could make one like it from a $500 junkyard core (using the original block, head, water, oil, crank and aftermarket pistons and rods) with a single turbo for much less money, but it's EFI and the electronics are $$$.
???
2JZ-GTE
Toyota Supra! nice mill. . .
regards,
stock92
92 Toyota MR2 5S-FE
Not American but still inline . . .
