I'm starting this thread because a member wanted to see what I'm using. I just mocked up a couple of mounts but none are finished. It looks like 3.5 Inches wide. I welded a piece of pipe on one and tacked a 70 bracket on another. I never had it totally installed. If someone else has some they made please show them to compare.
You went to a lot more trouble than I did. Left the pads that came with the engine from some unknown car, got everything lined up where I wanted it and zapped them with a stick welder. Pulled the bolts lifted the engine and welded them in tight. 100 passes and they have not moved.
Whynot just buy the bolton pads from TA ? They move the engine forward to get it off that retarded pinch weld on the firewall, which needs to be hammered flat btw. Cast iron isn't gonna want to stick to steel for too long either
<a href="http://s1320.photobucket.com/user/itsjustbriz/media/Skylark/0907111203a_zpsa8673b44.jpg.html" target="_blank"><img src="http://i1320.photobucket.com/albums/u540/itsjustbriz/Skylark/0907111203a_zpsa8673b44.jpg" border="0" alt=" photo 0907111203a_zpsa8673b44.jpg"/></a>
All you can do is bolt them to the motor and set it in place where you want it and make measurements. I had the front clip completely off and the core support removed so it was pretty easy.