340 No low end power

AdamR said
Loose the intake. Is the carb an aftermarket carter or an old factory avs ? I would swap the car for a new Edelbrock AVS 650 so you can get tuning parts easier.

The unilite will probably burn out at some point and when it does replacement parts are almost as much as a new distributor. but for now you need to find your total timing also. You may have 13 initial and to much total.

How much vacuum does it have at idle ? is the idle rough or smooth and what rpm does it idle at. Im betting its got a 284-.484" Purple shaft in it which is why it doesnt feel very torque. That cam and 3.21 gears with a stock converter is going to feel like a slug.

Pull the cover off the rear and see what the ring gear is stamped with. Im betting 2.76 or 3.21s

just a note, if the rear end is indeed a suregrip, you don't have to pull the cover to find out what gear set u have. jack up the rearend and in neutral turn the tire one full turn and watch how many times the driveshaft turns...if it turns 3 1/2 times to one tire rotation that means you probably have a 3:55 gear, if it turns almost 3 times you probably have a 2:96, little over 4, probably a 4:11 etc. etc.

also, i live in colorado and have a torker manifold on a 360 with a 600cfm carter with a 509 cam 292 dur. 360 heads w/slight port and 202 valves also shaved .038 thousands.. stock bottom end, 3200 stall converter full advance at 36 degrees.....i beleive initial is somewhere around 15 or 16 degrees...manual valve body race prepped 904....... it used to have a 3:23 gear in it......hammer down from a dead stop it would light the tires up so hard i would have to get out of it to keep it from over-revving.........you sure you got what u paid for?? did the guy show u receipts\pics of the build? does it indeed have the stamp "340" on the front of block just below the drivers side or left head? i don't know guys.....lot of information here, but if i was to take an uneducated guess i would say that it is a timing advancement problem, or carburation........if it's everything that you've been told that it is.......it should go to full advance in a matter of a split second, if it's not.......well lets just say lag city. time to start testing/verifying parts and settings, just my 2 cents...good luck,
higgs