I recently bought an '86 F150 with a swapped-in 351C which is topped with a Weiand X-celerator manifold and an Edelbrock Thunder AVS. The engine pulls real nice when I put my foot in it to kick it down, but off the line it's kinda sluggish.

Bottom line: What I want to do is adjust the secondaries to open earlier for more low-end power.

I know the Cleveland isn't the best for off-the-line torque, but I would still expect more power than this. The Thunder AVS has adjustable secondaries, which Edelbrock claims are "simple and quick" to adjust, but I didn't get the manual from the the guy I bought the truck off of, and I found the Edelbrock website to be of NO help at all.


Thanks for any help in advance, guys.



Rob.