Where have all the Magnum parts gone?

Bobzilla said
Most of the parts in those were stock Magnum casting block, heads, and crankshaft, with stock rods, rocker arms, pushrods, etc. the 300hp version even had stock pistons and, I think, stock camshaft.

What kind of parts are you looking for, as an example? Most of it has to be sourced with aftermarket replacement parts or aftermarket upgrade parts.

Both crate engines (300 and 380) used factory long blocks with the same blocks, cranks, rods, pistons, and cylinder heads. The 300 had a stock truck camshaft and a dual plane M1. The 380 had a larger roller cam and a single plane m1. Both were rated with 750cfm carbs.