engine mount brackets - frame side question

[panelrodder81]

My truck, 73 2wd, has obviously been hacked on over the years. Last fall I lost cylinder 1's main bearing and pulled the motor for a crate motor. It wasn't till I was putting the new motor back in that I noticed that the two frame side brackets, the angled brackets that motor mounts bolt to, where different than one another. I didn't snag a pic but I have found some supporting images.

It appears that there are some that sit the engine high in the engine bay and basically go straight from the top the rail to the xmember like this:


and then some sit the motor lower in the engine bay with a bend in the bracket like this:


As evidence to my truck's hacked on past.... drum roll please... I have one of each. The driver-side is the bent kind and the passenger is the straight kind. So my nice new crate engine sits leaning to the driver-side in the engine bay.

Normally I wouldn't care that much but the trans mount stripped out on the passenger-side because of it and the exhaust on the truck is **** but I couldn't put my nice exhaust on because the header flange hits on the driver-side because of the bent engine mount bracket. If I could get another straight bracket for the driver-side then I could bolt on my nice exhaust.

I hypothesized that that it was straight brackets for SBC and bend brackets for the BBC but I seem to see WAY more bent brackets than straight and it seems that BBC's were a little more rare than SBC's sooo my hypothesis is kinda out the window.

SO, the question I have is that even with the photographic evidence posted I can't find any information on what years or engines each kind of bracket was from to try and find a replacement.

Help?

-Panelrodder