I'll go then,
(1) How about a Big inch V8, I like the Cadillac 500" due to it can be built to produce 500+HP & 600+TQ on pump gas and weigh in at around 500lbs. (Voted "other not on list")
(2) TKO 600 face-plated, cryoed gears with a Lakewood bellhousing.
(3) Winters Quick Change solid axle, as much as I like a IRS, a properly setup live axle can handle as well and won't break.
I'm thinking of a Z what does everything well, street, strip, autocross, roadrace, not necessarily for fastest or quickest, but overall kicks A$$!!!
Mark