I have a '76 620 LWB that I'm going to be doing some extensive work to, and I'm looking some swap options for suspension. This truck will be primarily street driven, but it will see some road course track time from time to time, but nothing competitive, just casual club run track days or whooping on V8's at Powercruise USA. Powerplant will be a 515rwhp/509ft lbs VQ35 swap from my G35, so I need the rear end to be strong enough to support the power and torque.
At first I was looking at using a Toyota 8inch rear with a 4-link, but after reading more about 4-link setups they don't handle well. After further digging I found some threads about guys using the S13 subframes, and even found a thread about swapping the rear subframe in as well. I know the S13 rear diff and axles aren't going to like the power so I'd be upgrading diffs and axles. Are there any other swaps that would be a good option to look into? I'm not sure how I feel about a rear sub-frame swap because I'm then cutting into the bed to fit towers, and I want to be able to put the motorcycle in the bed.
Everything I've ever worked on and built has been uni-body and independent suspension, so this is a new realm for me. And yes, I'm well aware of the work that this will take. This is one of those "once in a lifetime" builds. I'm bored with just doing bolt-on work on modern cars, time to get out of my comfort zone and build something that fits me and my character.