I finally got me a 87 gt. It has ttops with 79k original miles all stock last titled in 97 and garsged ever since. I drained tank and replaced filter and all fluids. New distributed, plugs and wires. Not I finally got it running but after 15-20min of riding it acts up and loses power. It idles fine but if pedal is pushed it sputters. I replaced the tps and it still acts the same. I'm lost at this point and any help would be appreciated.