461rat

Are these a good choice to run with a Chevelle and LS setup? Wanting to run A/C and the new Holley engine mounts

Toddoky

The stock 4th-gen alternator will only install with the rear-bias Hooker A-body engine brackets. If you want to use a 4th-gen accessory drive set-up with the Hooker forward-bias engine brackets to take advantage of the better transmission fitment, then you'll have to relocate the alternator up on top of the cylinder header with the Holley or similar bracket.

461rat

Ok, I couldn't remember if that was one of the things that the forward brackets required.