Got around to updating my 6bt before putting it back in my 55.2 GMC. Working between our weekly snow storms, I put in new governor springs to upgrade RPM before defueling occurs. Removed and replaced tamperproof screws. Took the AFC apart to slightly increase rack travel, inserted next step fuel plate to match manual transmission HP rating. Replaced valve springs to match the governor RPM increase. Replaced head bolts with studs which requires removing part of the rocker arm pedestal to allow room for nuts. Adjusted valves after all else.
Ed
Last edited by EdPruss; 02/19/202211:58 PM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Ed, sounds like a nice set of upgrades. 3K or 4k governor springs? Also are you running a stock HX35 turbo? I've been tinkering with my 5.9 for the past 20 plus years and find it's always a challenge to keep smoke down when in your country. My goal is to run pretty much smoke free and on my home range (elevation 300') it's pretty easy. But with a 12k trailer on the old truck, and at 5,000 plus feet it's sometimes a little smokey.
