Here is a video from my 73 before I put it back to stock and sold it. Motor is the same 600hp currently in my 68.
Exhaust is 1.75" headers into 3" mid pipe with X into 3" Ulttaflow headers (19" long case) and out 2.5" tail pipes. Windows are open.
https://youtu.be/hp4DnJ1w88M
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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
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