If you like to cuss and swear when working on your car, changing a starter, oil filter and/or starter, go with headers. If you like the easy life, want a nice sounding exhaust with no leaks, and dont mind giving up 5-10 hp, definitely go with the RA manifolds!
I had a similar motor in my 66 GTO 4spd and the RA manifolds were awesome compared to the headers it had.
My 68 bird has headers, which are way easier to deal with on this car vs the Abody. If you are a weekend warrior like me, I am a believer in the following formula...
Mostly Street Car = Cast Manifolds
Mostly Race Car = Tube Headers
Sent from my SM-G965U using Tapatalk
__________________
68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight
|