There is a guy who builds G body 9" rears in Melfort, SK. Contact Cutlassefi on this site about your Holley EFI. He is an aftermarket EFI tech and a parts guy/ builder for us Olds V8 guys. His personal ride is an Olds Cutlass Convertible that had the Accel sequential EFI on an Olds 350, I believe he now has the AEM Infinity on it. The Terminator is supposed to be the best TBI system and the AEM Infinity the best sequential EFI on the market. Your car looks solid. My 88 days are numbered due to rot. Unfortunately these cars are pretty worthless here in Saskatchewan, so I am focusing on my 70S instead for a performance build, my 88 Cutlass is 30 mpg or die trying.