Quote:

I had a set of 750 vac. sec. Holleys on my tunnel ram and they ran ok. Nothing to really brag about. I the had a set of 660's worked up and it was night and day. I dropped 1 second.



I'm guessing something was badly wrong with your Holleys or the vac secondaries didn't work good on the tunnel ram.
My tunnel ram with 2 750 Quickfuel double pumpers ran 9's at 136 MPH, I highly doubt it would have went quicker with the 660's. But I'm glad you found something that worked better for your combo.

1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual