Quote:
Originally posted by run_gmc
Hey, Y'all,
short version of long story:
Removed 4.3L from 90 GMC 1500. Rebuilt a 350 from a '87 van.
Installed a Comp cam (kit with Gross valve lift Int .434 / Exh .444) flat top pistons, bored .030 over, crank turned .010 under. Approx 10K miles on rebuild, dropped a valve. Have not removed head yet to verify extent of damage. Can't afford to go with vortec / new intake / carb setup, so am looking for least expensive alternative to get it going for a couple of months until I get money to "do it right". What heads should I avoid? Any suggestions on which are best? Should I use new lifters and springs? sigh... i'm such a noob **) :whacked:
hi, heres some food for thought for ya, a few years back same thing happened to me through a machinist who put the wrong springs in, but i was like you and thought oh boy whole engine down the tubes, but i checked it out and it did put a nick in the piston which i thought what the heck im not going to be out anything if i mess up so i cleaned up the piston and got rid of all the sharp edges put a new valve in and the right springs and run her for a good 50,000 before pulling it for the 514 im putting in now so i would examine the damage and see what you got first and then decide you never know.