My '65 J2600 Gladiator was converted by the PO (MikeD) with a '69 Wagoneer Buick 350 married to a '69 TH400 3L80 out of his '69 Waggy. My 350 threw a rod and has a hole in the block, so a replacement engine is needed. I'm having some difficulty locating a good/running/reasonably priced...