Show your slant 6 a body!

Good on you ! Proper wheels and tyres make a big difference and you've chosen well. The car is now a cohesive whole.

I took a different direction from you though. I widened the rear wheel wells and installed a Ford 9" rear axle with 4 links and a Panhard rod, adjustable coil-overs, rear discs and a Strange limited-slip differential and then put 17" x 10-1/2" American Racing Salt Flats on the rear with Pirelli P Zero Assimetricos (285/40 YR 17-s).

What engine and interior mods do you have planned ?