If a Chev will fit, a Lexus V8 will too.
Advantages, lightweight, all alloy, quad cam, Vvt (from 1998) 32 valve. 6 bolt mains. engines up to 1000hphave been built without touching the bottom end, and an engine that gets even better when boosted.
(if you can squeeze a bit more space, Lexus/Toyota has a V12.)
928 V12 6 speed
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'82 928,2002 4.3 lexus quad cam VVTI V8,5 spd Auto.(at the front)BorgWarner 3.08/1 LSD-at the back-Weisach retained,Transaxle gone.Borla exhaust,XSchops Cayenne big brakes front ,968 front brakes rear.Mk4Supra m/s & servo. Alloy rad,1380kgs(3036 lbs(53%F/47%R))