[davepl]

I have a 70 Longhorn with a big block 400 as well, same as Wideside, and I have the same setup.

I had to fight with these, but it's been five years! Here's what I remember:

- I think the bolt supplied is TOO LONG and will punch into the block if used as-is
- I think the bolt they supply is METRIC

I had no problem getting a wrench on it or access to it, though, so double-check you're doing it the right way, I don't remember that at all!

A pair of NOS or original mounts would have saved me a great deal of time, these reproduction mounts are awful, but they're all we have at the moment I think for this weird mount.