Update,
After weeks of cleaning and painting I finally got to do some assembly. Had to build a bracket for the parking brake cables, so they would pull in the right direction. Pressed in all new PST Poly Graphite bushings, front and rear, along with all the steering linkage parts. PST has an awsome master kit! Cut 1/2 of 1 coil from the bottom of the front springs, just trying to make up for the lighter weight of my LS-1. Built a trans crossmember and dropped it in the rolling chassis, it fit like a glove. The alternator pulley is about 1/2 inch from the steering gear. The AC compressor was noisy in the donor car, so knowing I was going to have to replace it I decided to go with a high mount kit( yet to be ordered, suggestions welcome) that got me out of that spot. Bolted on the F-body manifolds, the right side fit without incident, the left side will not fit with the O2 sensor in the factory hole it will have to be moved. The cats will fit in the car prety well, right side hits the lower control arm mount slightly, hoping to heat and bend it to get some clearence. The left side fits without any trouble. Going to plug the factory O2 sensor hole in the left side manifold, and move down the pipe to weld in a new bung. Next is to install the PST body mounts and set the body back on to check clearence in the tunnel and on the AC box. I boxed the open part of the frame on both sides, without leaving a hole to put in the body mount, already checked and it is possible to pull the bottom part of that mount in with a string and get it worked around to bolt it up. Guess I will just get straight tubing and bend my own brake and fuel lines. Time to start thinking about reprograming the ECM, and reworking the factory harness. Pics to follow.