Yeah I just currently installed a sm465/np205 combination into my k5 blazer. I got it all back together and running and driving yesturday. When i was driving it i noticed a slight grinding feeling in the shifter when i tapped the gas a bit. I had a 383 stroker motor so it does have some power when i hit the gas. Its fine when im driving no grinding feeling but if i tap the gas a bit and let go quickly i can feel a little grinding. can anyone possible tell me what the problme might be. It shifts perfectly fine with no grinding or anything and the shift pattern is tight. the fluid level is right where it is supposed to be. Also when installed the new pilot bushing in the crank it went in a little further then flush wiht teh surface of the crank. Is that bad could that be wats causing this noise?