I'd vote for solids as well. (Do not change the trans to solid.) I got mine from Turbo Time but I don't see them listed there now. RPM has the complete kit. The pic shows the frame mounts with slots which you will need. I have a write up somewhere. I'll find it and post the link. The install is not as bad as some make it out to be. Now that I've done I'd do it again in a flash.
Edit: Check out:
http://www.syty.net/forums/showthread.php?t=48497&page=1&pp=15&highlight=not+removed
Post # 8
There are many other posts on this topic. The issue is getting to the the nuts on the frame pads. Naturally I think my method is the best. :tup::rotf:
Thanks alot man, if I go solid..does it matter if I already have a poly trans mount? and if I plan on doing 500whp with solid mounts..will I need to reinforce the frame in any way since the frame would want to twist?
Uh, no. Because a tie-down pulls down and you're already down to far aren't you? For an engine that is lifting they seem to work for some. I did not have good luck with the one I tried. My personal feeling is once the mounts go you're asking for trouble. Some folks have had the motor lift to the point where the alternator fan cut the upper rad hose. Not good. BTW Are you positive it's the mounts?