EARLY A body hooker header install P/N 5208 UPDATE!

Ouch!! I hope the HP is worth the trouble. They do look good, and I guess early A options are somewhat limited. I carry stock 273 manifolds on my 65 cuda with the 340, but I'm loosing a good 50 horses without headers. Any suggestions? I'll agree TTI has a good setup, but $450 each is way out of my range.