Do you think there would be enough hood clearance with the new style motor?
Yes I believe so. While the 4200 is wider, its not as tall as a 292. Once the front sump is moved the motor fits nicely on the nova cross member.
Even an early 4200 with a good exhaust will make 280ish HP.
Last weekend I helped a buddy extract a 2005 4200 at the local u pull it yard - complete with harness, PCM and all the small bits to make it work $300.
