sbc swap question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rev616 · 03-13-2010, 02:31 AM

this may be a dumb question.my 61 has a 235 and a 3 on the tree.what will need to be done to put a small block in with that trans??

**Captainfab** · 03-13-2010, 02:51 AM

You will need to change the bellhousing to one from a V8 or an I6. Your truck being a '61 has a hydraulic clutch. Finding a V8 bellhousing that will accept the clutch slave cylinder will not be easy ('60-'62 only). However you can use one designed for a mechanical clutch. '63-'67 has the small center hole ( 4 5/8"), and '68-'72 has the larger hole (5 1/8"). You will just need to either buy a hydraulic conversion or fabricate one yourself. Novak adapters sells the conversion kit. If you cannot find a bellhousing locally let me know.

http://www.novak-adapt.com/catalog/kit_hcr3.htm

62gmc910 · 03-13-2010, 04:39 PM

If you can't find a hyd clutch bell , scarce as hens teeth, but your hyd clutch slave is in good shape you can modify it to fit the left hand opening quite easily , the clutch fork from your 235 bell will work "my" modification works with the stock cylinder

03-13-2010, 02:31 AM	#1
rev616 Registered User Join Date: Feb 2010 Location: kalamazoo michigan Posts: 24	sbc swap question this may be a dumb question.my 61 has a 235 and a 3 on the tree.what will need to be done to put a small block in with that trans??

03-13-2010, 02:51 AM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: sbc swap question You will need to change the bellhousing to one from a V8 or an I6. Your truck being a '61 has a hydraulic clutch. Finding a V8 bellhousing that will accept the clutch slave cylinder will not be easy ('60-'62 only). However you can use one designed for a mechanical clutch. '63-'67 has the small center hole ( 4 5/8"), and '68-'72 has the larger hole (5 1/8"). You will just need to either buy a hydraulic conversion or fabricate one yourself. Novak adapters sells the conversion kit. If you cannot find a bellhousing locally let me know. http://www.novak-adapt.com/catalog/kit_hcr3.htm __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

03-13-2010, 04:39 PM	#3
62gmc910 Registered User Join Date: Nov 2009 Location: Cremona AB Canada Posts: 370	Re: sbc swap question If you can't find a hyd clutch bell , scarce as hens teeth, but your hyd clutch slave is in good shape you can modify it to fit the left hand opening quite easily , the clutch fork from your 235 bell will work "my" modification works with the stock cylinder __________________ 62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) Last edited by 62gmc910; 03-13-2010 at 04:41 PM.

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