The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - '71 GMC 2500 exhaust manifold (350) interchange.

Andy4639 · 09-30-2019, 09:35 AM

Glad you got it going again. Those manifolds will blow out like that if you hit them with water after a long hard run. Are you open the hood up after a long run in the rain the rain runs off the hood down into the motor. Over time they get weak and will blow out.

09-30-2019, 09:35 AM	#31
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: '71 GMC 2500 exhaust manifold (350) interchange. Glad you got it going again. Those manifolds will blow out like that if you hit them with water after a long hard run. Are you open the hood up after a long run in the rain the rain runs off the hood down into the motor. Over time they get weak and will blow out. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.