OK I'll chime in on the A/C issue.
My car had dealer air installed in '65 - can't prove it, but the car was sold in July '65 in Oklahoma - HOT HOT HOT. Car was built in April and Ink stamp datecode on the back of the original A/C unit is June '65.
I purchased the car in '79 with everything intact - A/C didn't work, but after 14 years that was no big surprise.
The Ford system for the HiPo used a special aftermarket lower pulley that fit the HiPo balancer - I still have mine - it is a large cast iron three groove pulley and is a snug fit with the ID of the HiPo damper. I'd be happy to provide photos or measurement details to anyone interested. Also, Bob Mannel's Small Block Ford book has a picture of a Ford prototype HiPo engine with A/C and power steering installed. My pulley looks just like the one in the photo - at least at that angle. My pulley would allow A/C and P/S to be used on the HiPo.
Oh - let's not forget Henry Ford's HiPo coupe had A/C and P/S too.
I can also confirm that the Green '66 GT350 convertiable has A/C too. Never looked at the lower pulley though. Not sure I have any photos of the engine on that car.
I've pulled the A/C completely off my car and had the firewall repaired back to stock non-A/C condition because I didn't want to get into the A/C value or originality debate - plus it saved me $$$ on the resto so far.
Besides as a teenager I never drove the car with A/C anyway, so I know how hot it is - to me that is part of the fun and memories once I get it back on the road!
![]()
![]()
![]()