I recently got a 91 GT in MO and drove it up to SD. It ran great. 2 days later,6 of the 8 injectors were leaking gas. I got new 19# from Summit and got the old,cracked,mismatched ones replaced. I put it back together and took it for a test drive. It felt like it was mifiring or it was intermittant on 1 cylinder. It didnt feel like full power either. I took it apart 3 more times to check all wiring and replace gaskets on the plenum and throttle body. Now it seems to be worse!!! Is there a way to test injectors without dismantling everything?? What else might it be?? Thanks guys.