Srt-68 Barracuda

Diesel, if anything.

Already done the 5.7 Hemi, obviously in the process of doing the 6.1 Hemi, so what's left from Chrysler?

Turbo Diesel.

I'm with you on that idea don't take a whole lot to make in excess of 500 HP and 1000 TQ at the rear wheels with a 24V ISB. Note daily driver in my signature. Fitting it in would be fun have to move the firewall a few feet back probably for starters. A straight front axle out of an old Dodge van could address the weight up front. Would definitely be unique.