Years ago I built a 60 el camino, and before that a 71 C/10. One thing I loved about chevys was the common engine mounting system , common bell housing from straight 6 to V8. It just made engine swaps so simple. Both vehicles had 250 straight 6 engines, and 350s swapped right in.
Mopar junque not so much. The only common item from 6 cylinder through Hemi V8s is the transmission mount. That's it. Slant 6 uses it's own unique trans bellhousing, K frame and mounts. Ditto for small block, and big block, with Hemi sharing a big block bellhousing pattern but requiring it's own unique engine mounts and K frame. All this makes engine swaps a lot harder. Used to be a few companys that made bolt in adaptor kits to swap V8s in place of the 6. With any adaptor kit, theres always shortcomings.
When I got my son's car it came without any front end. This included engine K frame and lower suspension arms. The upper arms and drum brakes were attached and hanging, torsion bars, and complete steering setup were in the trunk. I did a trade and was able to get a 67 K frame and lower suspension arms. Problem was it was a slant 6 K frame, and used a 1 year only idler arm mount. This mount design is weak, and replacement 67 only idler arms are about $150 if you can find them. We are going with a V8. I dont like adaptor kits either. Car is a 69 anyways so I need to mod this thing. Contrary to popular belief most of these older barracudas came with 6 cylinder engines just like dodge darts did. V8 K frames are not super easy to source.
A buddy of mine had a 68-72 V8 K frame he was willing to let me borrow to mod the one I have. What I found out engine wise, is the LH mount is the same as the V8 with slight modification to the front. Only the RH mount needed to be cut off and replaced. I made a jig off his K frame, with heavy gage 2" steel tube, and made templates for building a RH V8 mount to putting it in the correct location. Lopped off the "slant sux" RH mount, ground it all smooth, and installed a RH V8 mount where it's supposed to go.
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