The three options that I have experience with...
It sounds like you want a mount that allows some engine movement and lasts without breaking frequently, I suggest you try the NAPA mounts, they are a factory style, and have two stops built-in and yhey cost the least of my three options, but they do allow the most movement…
The mity mounts are a good option, however they do allow some movement. The left side of my engine was lifting slightly with mity mounts installed, but they never broke...I forget what they cost, I think they were over $100...
Right now I'm using solid mounts, and a urethane trans mount, with no problems, after 636 passes the engine still does not move at all, which is what I wanted...
I don’t think the the A-body mounts will work in a F body so the clever Jim Hand trick is not an option…
The pic with three mounts, shows two well used mounts on the left that never failed because of the two-stop design, the one to the righ only has one stop...
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1969 Firebird, Tx3-455/468 machined by CVMS
E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid
850DP on E-85 by Eric Niefert/T2 1" plastic spacer
T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400
1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine)
https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be
1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine)
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