Mabye timing issue

[supradaddy0803]

First thing where is Texas you at? Second I would check the timing it may be the distributor bolt is loose and moving when you rev it. Best way to check this is to grab the top of it and try to turn it if it turns even just a slight bit then try tightening it. Another thing to check is the cap and rotor if there is a crack and a carbon trail then it will back fire when it is spinning fast. This is unlikely but you never know. Also one other thing what kind of exhaust do you have is it aftermarket or the factory one, if aftermarket then there is the possibilty that there isnt enough backpressure and it is gonna do that.