problems with headers

yes. it equalizes the exhaust. a crossover of somekind is essential

first, spintechs, HELL YES
second, H or X pipe, probably for the better,
however, ppl on here have done straight out pipes successfully - no crossover -

did you figgure anything out yet?
if not, my suggestion:
if money is a (huge) issue, you could buy the cheapest h-pipe out there like the summit one or some crap. instead of fooling around with the header/h-pipe joint and trying to get the H-PIPE to meet the header flange properly, try this. since some of the cheaper h-pipes come in two halves, (driver side and passenger side) and clamp together at the crossover, you could bolt each side on independantly and have an exhaust shop weld the crossover together while its on the car and fitting. then it will be one piece made to fit your car. but the crossover might end up a few inches longer or a little bit angled or sumthin,it may slightly affect perfomance too since h-pipes are designed for the timing of the exhaust gas, but thats what i would do.
i also wouldnt count on the cheaper pipes having a lot of thought invested in that aspect anyhow.