Kewl beans! Probably scary as hell too! I have a '76 Monza that I've had since '78! Original V8/4-speed car, had 4.3L originally which I built once at 100,000 miles and then after another 100,000 miles I built a 350 for it!Just bought a 1976 Vega with a 454, 4 speed. Fun as hell
If you haven't already you should check out H-body.org.
Saw a Monza at a local shop many years ago that they were shoehorning a big block into. Total hack job! Welded motor mounts, the valve covers stuck up over the fenders so no hood ever. Never saw the car on the road. They probably twisted it into a pretzel on the first drive (IF it ever drove)!
Here's my "Beast":