Well,
I've decided to do a LSx conversion (L59 5.3)! If anyone out there needs a strong 400 engine (1969 xz 360HP) or a TH350, let me know. I'll be selling them in a month or so. You can still hear them run in the car now.
If anyone has stock LS1 exhaust manifold lying around...I may be willing to take them off your hands
I'll post updates and photos as I begin.