Memphis Equipment Company (
http://www.memphisequipment.com/ ) can probably provide a NOS military 302 oil pan and pickup. They used to publish a printed parts book that illustrated these pieces. You can find used pans and pickups available. i have one and so do others in this forum. The rear sump is deeeeep, but if the front of the pan clears your suspension, then the sump could be modified relatively easily in a truck.
i never encountered a problem with a beam axle at speed until about 40 years ago when i owned a 1937 Chevrolet pickup that wanted a GMC but had a 348 big-block. We had a lot of labor to overcome "shimmy" at 55-60 mph in that truck, no matter how smooth the road. Cranking in the caster would stop it, but then the truck would not pass state inspection. On the other hand, many people over many years have driven beam axles at high speed on rough surfaces at the dry lakes. i am generally suspicious of most IFS conversions, especially when they replace an older IFS in a 1950s Chevrolet, which is the same as an early Corvette. i do not doubt that a beam axle under a truck can be made to handle relatively well and safely. i'll have an opportunity to test that theory when the new engine and overdrive are installed in my 1949 Studebaker 2R10.
God's Peace to you.
d
Inliner #1450