i have a 77 blazer with a 400ci engine..its has edelbrock crap and all the good stuff. a few weeks agod it started to not idle very well for some reson, especially in gear. I replaced the fuel pump and it had been idleing fine for the past 2 weeks. Just today it went back to its old ways of rumbling and barelyy staying running. Also when i stop and go it doesnt also start in 1st gear. i have to roll it a little to pop it into 1st. What could be the problem? i also would like to put a pair of cutouts on my truck..does anyone know if it would sound ok? ive heard cutouts on newer trucks not old ones though. thank you.