i have a 99 gtp want to put on a 3.5 pulley but i was worried about kr . can you hear kr like on an 78 350 chevy w/ the timing advanced too much. did this many times and never chipped a piston. if i get a ubend delete and 3'' downpipe 93 octane can i run the 3.5 pulley safely? also if i did what kind of 0-60 and 1/4 time should i expect