Early A-body SBlock headers

I was going over old posts, to see if any one has ever used these shorty headers for 64-66 A body. Don't want to cut up my fender wells. Layson's say they now have them in stock. $300.00. They have to be better than my 65 273 exhaust manifolds. I have a 360 crate (380hp) with stock 4 speed in a 65 Cuda.