backfires alot out exhaust and carb

[83StangSGT(P)]

I have an 83 gt. The car backfires out of the exhaust alot and when i hold the gas down flames come out of the edelbrock avs carb. ive taken the distributor out and made sure im at TDC and re stabbed it in with the rotor pointing strait at num one. Cap and wires are 100percent in right place. I dropped a intake valve over the summer. i sent my gt40 head to the machine shop and had new valves and seats installed. i put the head back on and now it backfires. timing is at 14degrees. i run a MSD pro billet distributor and 6al box. Im at a loss. cant find any vacuum leaks spraying carb cleaner around the intake. any help is appreciated

 

[83StangSGT(P)]

i also re torqued my rockers to 20lbs. is there a set number of turns jets have to be. the carb was off and could have been messed with.

 

[srtthis]

what size air bleeds are you running?

 

[83StangSGT(P)]

I installed the carb strait out of the box. im not sure. what ever a stock edelbrock thunder series 650 carb comes with.

 

[srtthis]

prob going to need to adjust them... even our custom built 1250 QFX needed every air bleed adjusted.

http://www.quickfueltechnology.com/technical-info

read this and you'll get a better understanding of the carb and what your doing with the adjustments of them

 

[83StangSGT(P)]

Thank you for your help. i appreciate it.

 

[srtthis]

No problem... There isn't a jet in that "custom" built carb that didn't need changed