6 cylinder tranny with small block - The 1947 - Present Chevrolet & GMC Truck Message Board Network

The Blue Pig · 01-14-2003, 12:04 AM

I have a 71 2wd half ton with a factory 6 and one of those 4 speed manuals with three regular gears and an unsynchronized, tall as all hell first gear. Has anyone dropped the 6 cylinder, left the tranny and put a 350 in? If it mounts to the bellhousing fine, what about the clutch linkage that bolts to the frame and block? Any ideas or suggestions?

jostrans68 · 01-14-2003, 02:40 AM

If you mount the engine in the 6 posistion all linkage should work did on my 292.... some guys say its a better location for balance only prob is HEi wouldnt fit...My .02 Jack

cableguy0 · 01-14-2003, 04:24 AM

if im not mistaken there are a few guys running hei with the v8 in the six cylinder position. its tight bu it fights from what i understand. good luck with the swap

crazy longhorn · 01-14-2003, 09:34 AM

Yes, the sb will bolt in on the 6/250 stands. the HEI will fit, but is tight .......I can remove/replace the dist with the cap & rotor off. I used the 73 up water pump, steering pump,brackets & pulleys to get the fan proper distance with the shroud without a bunch of spacer. On the clutch linkage, I used the V8 pcs, but with a couple mods. I used a screw in pivot ball, in the foward hole in the block, & set the bellcrank up perpendicular to the block, & redrilled the holes for the frame bracket. the bottom rod was also adjusted for lenght. Set up like this, a set of 69090 headmans fit & cleared the linkage. Im not sure about header clearance on the bell crossmember, as my truck was an auto converted to stick(pretty sure they will go tho). Good luck, crazyL

01-14-2003, 12:04 AM	#1
The Blue Pig Thread Wizard Since 2002 Join Date: Apr 2002 Location: Fairbanks, AK Posts: 102	6 cylinder tranny with small block I have a 71 2wd half ton with a factory 6 and one of those 4 speed manuals with three regular gears and an unsynchronized, tall as all hell first gear. Has anyone dropped the 6 cylinder, left the tranny and put a 350 in? If it mounts to the bellhousing fine, what about the clutch linkage that bolts to the frame and block? Any ideas or suggestions? __________________ --70 C-10 Longbed --71 C-10 Longbed --72 K-20 Longbed --74 C-10 Shortbed --86 Toyota Tercel (His Driver) --05 Chevy Trailblazer (Her Driver)

01-14-2003, 02:40 AM	#2
jostrans68 Jostrans68 Join Date: Mar 2001 Location: Bloomington indiana Posts: 1,182	If you mount the engine in the 6 posistion all linkage should work did on my 292.... some guys say its a better location for balance only prob is HEi wouldnt fit...My .02 Jack __________________ [CGTW Member former 67-72 now with a 96 silverado

01-14-2003, 04:24 AM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	if im not mistaken there are a few guys running hei with the v8 in the six cylinder position. its tight bu it fights from what i understand. good luck with the swap __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

01-14-2003, 09:34 AM	#4
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Yes, the sb will bolt in on the 6/250 stands. the HEI will fit, but is tight .......I can remove/replace the dist with the cap & rotor off. I used the 73 up water pump, steering pump,brackets & pulleys to get the fan proper distance with the shroud without a bunch of spacer. On the clutch linkage, I used the V8 pcs, but with a couple mods. I used a screw in pivot ball, in the foward hole in the block, & set the bellcrank up perpendicular to the block, & redrilled the holes for the frame bracket. the bottom rod was also adjusted for lenght. Set up like this, a set of 69090 headmans fit & cleared the linkage. Im not sure about header clearance on the bell crossmember, as my truck was an auto converted to stick(pretty sure they will go tho). Good luck, crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....



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