Removing Bellhousing Crossmember? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SBC RACING · 11-27-2009, 06:24 PM

Hey guys,

In the process of installing long tube headers on my 62' and ran into a problem with collector to bellhousing crossmember clearance. I have swapped out my SM420 for a Muncie M21 and also fabbed up an auto trans style crossmember that goes under the trans tailshaft. So my questions is, can i remove the bellhousing crossmember without causing any problems? My truck has the horse shoe style front motor mount so im a bit concerned that the trans crossmember has to support both the trans and the rear of the engine. However, im no expert so id like to hear everyone else's opinion/experience

Thanks so much

markeb01 · 11-27-2009, 11:23 PM

You're going to need to convert to side engine mounts. With the horse shoe mount on the front and tail shaft mount in the rear, there will be nothing to keep the engine from twisting over from torque. In addition, if you're using an aluminum bell housing with a support span so far apart, there can be enough stress to cause pilot shaft/clutch alignment problems if not a broken bellhousing. You should be able to use the mounts shown on the attached link with a 1" spacer to make up for the difference in frame heights from the 62 to the later style frame.

http://67-72chevytrucks.com/vboard/s...d.php?t=369663

**Captainfab** · 11-29-2009, 12:47 AM

I agree with markb01, You need to convert to side motor mounts. You can also use the '73-'87 style mounts for the conversion. The frame brackets from a 3/4 ton will work better than the ones from a 1/2 ton. However on the '60-'62's you will still need a spacer on top of the frame as shown on the link above.

62gmc910 · 11-29-2009, 01:35 AM

Quote:

Originally Posted by Captainfab

I agree with markb01, You need to convert to side motor mounts. You can also use the '73-'87 style mounts for the conversion. The frame brackets from a 3/4 ton will work better than the ones from a 1/2 ton. However on the '60-'62's you will still need a spacer on top of the frame as shown on the link above.

I agree with the '73-80 mounts they are a lot solider, but we usually sectioned the mount plate to fit the frame it looks a lot cleaner especially if you make the cut below the mount but then you have to redrill the holes

11-27-2009, 06:24 PM	#1
SBC RACING Registered User Join Date: Aug 2009 Location: Southern California Posts: 8	Removing Bellhousing Crossmember? Hey guys, In the process of installing long tube headers on my 62' and ran into a problem with collector to bellhousing crossmember clearance. I have swapped out my SM420 for a Muncie M21 and also fabbed up an auto trans style crossmember that goes under the trans tailshaft. So my questions is, can i remove the bellhousing crossmember without causing any problems? My truck has the horse shoe style front motor mount so im a bit concerned that the trans crossmember has to support both the trans and the rear of the engine. However, im no expert so id like to hear everyone else's opinion/experience Thanks so much

11-27-2009, 11:23 PM	#2
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: Removing Bellhousing Crossmember? You're going to need to convert to side engine mounts. With the horse shoe mount on the front and tail shaft mount in the rear, there will be nothing to keep the engine from twisting over from torque. In addition, if you're using an aluminum bell housing with a support span so far apart, there can be enough stress to cause pilot shaft/clutch alignment problems if not a broken bellhousing. You should be able to use the mounts shown on the attached link with a 1" spacer to make up for the difference in frame heights from the 62 to the later style frame. http://67-72chevytrucks.com/vboard/s...d.php?t=369663

11-29-2009, 12:47 AM	#3
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,254	Re: Removing Bellhousing Crossmember? I agree with markb01, You need to convert to side motor mounts. You can also use the '73-'87 style mounts for the conversion. The frame brackets from a 3/4 ton will work better than the ones from a 1/2 ton. However on the '60-'62's you will still need a spacer on top of the frame as shown on the link above. __________________ 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



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