Ive got an 88 RCSB small block 350. The problem I'm having started about 3 weeks ago and I cant figure it out. I can stall my truck up and launch it and it will do just fine, but if I try to powerbrake it to warm the tires up, it will break traction then act like its running out of fuel and sometimes it will cut off. It also does it sometimes if I keep revving the engine then it will finally do it, but it always does it when I try to powerbrake it. Just wondering if its fuel related or maybe ignition/electrical. Other than that truck runs perfectly. Thanks for the help.

 

Fuel filter maybe?