94 jeep 318 in my 76????

I think a small 4-bbl. will be more worth your time. Especially since the Magnum engines have a different intake manifold bolt angle so an old-school 2-bbl. LA intake won't bolt up anyway. It will be difficult in cold weather though since Magnum engines also don't have an exhaust crossover to heat up the intake. I built a 360 with Magnum heads and got one of those factory 4-bbl. dual snorkel air cleaners with the hot-air induction so it will at least get some heat when it's cold outside.

Oh and +1 on the oil pan and pickup...