engine placement - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**kwmech** · 11-27-2004, 09:16 PM

Have a 69 GMC 1 ton. Soon to pull the 350 out and go to a 400sb. Also going to put TBI on it with the serpentine belt set-up. I think the serp set up pushes the fan forward about 1 to 1.5'' forward. My thoughts are to use the big block towers which will allow the use of the heavier duty motor mount. Will this put the engine back for the fan placement?

68w/sbc406 · 11-27-2004, 10:03 PM

i thought that sb and bb mounts were the same, except for a dip in them for the manafolds??? if that were true you could use bb mounts on a small block

breeh · 11-27-2004, 10:38 PM

I agree with 68w/sbc406. I am not sure that changing the motor towers is going to change engine placement. the solution might be as simple as not running a fan spacer to gain back fan depth in the shroud. If it still pushes the fan too deep you might be able to run a big block shroud which would also allow the use of a bigger fan blade.

Tx Firefighter · 11-27-2004, 10:50 PM

set it on 6 cylinder stands in the rear holes.

Problem solved....

**kwmech** · 11-27-2004, 11:46 PM

The set-up I have with the serp belt is a fan clutch. I like the idea of the BB shroud, that may work out just right--won't have to move the trans then.

11-27-2004, 09:16 PM	#1
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,650	engine placement Have a 69 GMC 1 ton. Soon to pull the 350 out and go to a 400sb. Also going to put TBI on it with the serpentine belt set-up. I think the serp set up pushes the fan forward about 1 to 1.5'' forward. My thoughts are to use the big block towers which will allow the use of the heavier duty motor mount. Will this put the engine back for the fan placement?

11-27-2004, 10:03 PM	#2
68w/sbc406 Got Light Emitting Diode? Join Date: Apr 2004 Location: Newberg, OR Posts: 2,485	i thought that sb and bb mounts were the same, except for a dip in them for the manafolds??? if that were true you could use bb mounts on a small block __________________ 1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car) 1993 Cherokee work ride/weekend wheeler

11-27-2004, 10:38 PM	#3
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	I agree with 68w/sbc406. I am not sure that changing the motor towers is going to change engine placement. the solution might be as simple as not running a fan spacer to gain back fan depth in the shroud. If it still pushes the fan too deep you might be able to run a big block shroud which would also allow the use of a bigger fan blade. __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

11-27-2004, 10:50 PM	#4
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	set it on 6 cylinder stands in the rear holes. Problem solved.... __________________ I'm on the Instagram- @Gearhead_Kevin

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11-27-2004, 11:46 PM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,650	The set-up I have with the serp belt is a fan clutch. I like the idea of the BB shroud, that may work out just right--won't have to move the trans then.



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