There's an old article floating around on the internet called "V-8 Juice For Your Stovebolt." It was written by Pat Ganahl back in the seventies, provided some good tidbits about the basic V-8 swap without all the excess geegaws. I believe you might find a link in chevytrucks.org in the tech section. long story short, he recommended a 307 c.i. exhaust manifold (still had to move steering box out). My own personal experience with a V-8 Vega (first car) would be to try the 305 c.i. manifolds, switch 'em side-for-side on the engine, dump the exhaust pipes down at the front. This should give you all the clearance you'll need. Hope this helps.
Regards,
Wannabe
