there is videos on youtube of gt's with big blocks, so it can be done. but like the other guy said, it would be ALOT of power. .28's are in mt's and truggy's that weigh 9+ pounds. the gt weighs 3 or 4 pounds. so it would be alot to handle
ive got an os 18 cvr in my GT, and it will flip over from 15-20ish if i hit it full throttle. and it dropped right in with no mods