Those mounts are no more solid than the stock cups are solid.
Those mounts are no more solid than the stock cups are solid.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
I used the same mounts as you did on my swap and had to cut a section out to clear the block on the passenger side and had to use washers to clear the triangle part of the original mount if that makes sense.
i just started putting a 5.3 in my 86 with those mounts, had to grind the tab, on the block, so the mounts would bolt up, once i took about 1/4 inch off it fit good.
1987 jeep wrangler, 1999 LS 1, 4l60 231j transfercase, dana 30 frontend ford 8.8 rearend 3:73 gear ratio. sandersons shortie headers, 2.25 inch exhaust into 3 inch flowmaster muffler.
i wouldnt grind on the block just trim the motor mount cup on the bottom to clear it, i had the same problem.
1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI