High RPM after Carburetor Rebuild
I'm new to this forum. I love classic muscle cars. Working on my 67 GTO, and I'm a little stuck. Any advice is appreciated...
I rebuilt my Edelbrock 1405 (600CFM) that was on my 1967 GTO 400 engine. After I installed it and fired it up, the idle is around 1500 RPM. Actually bought a new 1407 Edelbrock 750CFM thinking I messed something up during rebuild. Same thing after installing the 1407, idle at 1500 RPM to 2000 RPM. Didn't touch the distributor or anything that could mess up the timing.
Any idea what I did wrong? Any advice is much appreciated.
1967 GTO, 400 engine with TH400 transmission. To my knowledge, everything is stock.