The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1986: np208. 700r4---->th350 swap, need advice

OldCreek · 02-14-2009, 07:03 PM

I seriously doubt that there is any difference in the mating surfaces of the two adapters.... I would gues you could make it work with your original adapter.

Also, the same spacer/adapter that people are using when they trade in a 700r4 for a th350 could be used in your conversion to make up the space lost by the shorter th350 but I think that requires a longer output shaft for the tranny. I think. But, if the tranny is already hooked to the engine I would think you're just gonna move the engine back.

02-14-2009, 07:03 PM	#5
OldCreek Registered User Join Date: Jan 2007 Location: Central Coast California Posts: 1,026	Re: 1986: np208. 700r4---->th350 swap, need advice I seriously doubt that there is any difference in the mating surfaces of the two adapters.... I would gues you could make it work with your original adapter. Also, the same spacer/adapter that people are using when they trade in a 700r4 for a th350 could be used in your conversion to make up the space lost by the shorter th350 but I think that requires a longer output shaft for the tranny. I think. But, if the tranny is already hooked to the engine I would think you're just gonna move the engine back. __________________ 1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263 Last edited by OldCreek; 02-14-2009 at 07:04 PM. Reason: because