St205 maintenance stuff..., What do you guys think it is??? Options

[injection]

Hey guys, so have a list of questions for you guys to see how good your mechanical skills are...
Just finished st205 swap into my 94 GT, this thing rocks! But for some reason around 4300rpm and up there is a strange hesitation, it feels like it should have so much more then what it has, ( PS. Already installed new plugs, wires are mint, new cap n rotor, as well as new coil, fuel filter, and walbro f pump,
As well I am getting back firing happening, was told my timing is out because of the back firing..is this true? If so could someone tell me the degrees the timing is supposed to be on a 205 engine,
Thanx for all your guys help...don know what I would do without this place.....

PS safe celicaing

[BriinumsBo]

check spark wires, either damaged or might have just come off the plugs as in my case one of the wire wasnt secured enough on the sparkplug..

[injection]

check spark wires, either damaged or might have just come off the plugs as in my case one of the wire wasnt secured enough on the sparkplug..

I have checked the wires with a multimeter, and they checked out great..with no rips or tears in the boots or line itself....good call about a wire popping off though, I will definitely check that, at least worth a try..thanx man