[FirstOwner69]

I'm not sure you'll get much info here since those brackets are clearly not what was originally used on these trucks. All SBC engine trucks from 67-72, with or without A/C, came with the alternator on the driver's side. Below is a picture of the front of my GM 350 crate engine with Vortec heads. If you go with factory A/C brackets with your Vortec heads, you will find that the 2 upper braces (not present in my pic) won't work due to the different intake bolt angle and placement. I had to fabricate my own braces. It won't solve your problem, but I hope the pic helps.