Better 460 Motor Mounts
I've had it with lame aftermarket 460 1/2 ton conversion mounts as well as vendors who won't warrantee their junk.After breaking 3 mounts from a vendor who shall remain nameless with a stock 460 and having him tell me I'm making too much power so therefore he wouldn't warrantee them I knew I could no longer give him any more business. I looked into other aftermarket mounts and they're either based on the same crappy design or too expensive. I recently pulled a 460 out of a truck that originally had an M in it and found a real easy way to do this if you don't mind raising the motor a little high and pushing it forward. All that was done was to take a piece of 1/4" plate and drill holes for it to bolt to the 460's bosses, and then holes were also drilled in the plate to mount the M mounts to it. Viola. Too easy, but I didn't like where the motor ends up so here's how I made my mounts
Old Mounts
Nothing but rubber to keep them from pulling apart. Gee, I wonder why they fail?
The problem is that there's only an inch of space between the plate that bolts to
the motor and the perch making it real hard to fit a typical bushing/bolt style mount which is the ideal
type because there's no way for it to pull apart. Aftermarket mounts of this type that I've seen
completely replace both perches which is why they're so expensive
The easiest solution is to make the gap bigger. The lines show where I'm about to hack the perches
The rest is simple and I documented how I actually did it. There's a thousand other ways it could be done.
These are the plates that bolt to the motor. They're leftover from the broken mounts after removing what was left of the rubber. I used these plates because they already had holes drilled where they needed to be. Any chunk of 1/4" would work though
3/8" tabs welded to the plates
CJ leaf spring pivot bushings fit perfectly in some chunks of 1 3/4" roll cage DOM I had laying around. I then used a 1 3/4" hole saw to drill through a chunk of 2x2" square tube. Then it was cut in half and the resulting pieces welded together
Here they are partially assembled
The original mounts were 1 inch thick. The ones I'm making are 3 inches from the engine plate to where they mount to the perch, so 2 inches of perch was removed from each side to allow them to fit. 1/4" plate will be used for that actual mounting surface that was cut away
Mounts completed
I didn't want these flexing at all so I reinforced the backsides of them with some scrap angle
different angles of them attached to the motor. Lots of room between
the bushings and the exhaust so they'll hold up.