I almost bought a ‘72 Delta 88 with a 455 Rocket in it, but the car was so heavy, it couldn’t get out of it’s own way until it hit 50........
My 65 was surprisingly agile tho it had to have been heavy.
I had reversed the lid on the air cleaner which allowed more air in. It had the coolest roar when you floored it and heard that rocket V-8 sucking in the air.