Welcome. If you just start at the 1st post in the Forum, and just read through all the posts, and the Articles too, you will learn a lot about Jetfires.
631 is also for Jetfire. 636 is Starfire full size car. Later, Olds made a Jetstar and Jetstar II.
So Jet, Star, Fire, were all used in different orders at one time or another.
The engine in later F85s and Cutlass was called Jetfire on the air cleaner just to confuse things more.
I found the correct repro bushings for the 15/16” bar. It is a 1963 corvette bushing and is exactly like the original, here is a photo and my originals that are distorted from years of use. These fit perfect and have the locating bulge. Tracy Corvette has these and they also have 3/4” which equals 12/16” so close to the 13/16” bar size and would probably work.
My 63 has semi gloss engine compartment from the factory. The pic is from under my wiper motor. It’s a good quality paint. My car was undercoated, if that had any thing to do with it
The seat upholstery made by Distinctive Industries is an exact repro and has the carpet on the lower front seat backs like original. They also make the door panels which are also exact match. You just have to transfer your chrome from the old panels.
eBay is a great source, or go to their website for dealers.
I am restoring my original hub caps and wheels. The hub caps are nearly mint but the F85 red logo is faded. As I started to remove the original paint, I could see the unfaded paint below. It looks the same as the translucent paint on the rear F85 emblem. So I found a perfect match paint. The black painted areas are nearly perfect so I just waxed it.
I’ve done it. Disconnect transmission and pull it back. Disconnect exhaust, motor mounts etc. Raise engine and disconnect oil pan. It won’t come off until you reach in and unbolt oil pickup. Then it will come off. You have to reverse procedure to put back together. Pain in the ass. I would pull motor it’s quicker.
