motor mount Q - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67 SS · 07-14-2003, 10:12 PM

I might be finally getting a big block to drop in my old 67.I allready have a 4:11 posie out of a 71-72 and a tranny crossmember out of a 71 3/4 ton automatic(the 67 had a 6/3 on tree).I'm planning on putting the front crossmember out of a 73 up under it and using the 73 up motor mounts.Will the 73 up crossmember be a direct bolt on?Are the 73 up motor mount towers different between a SB and BB?Is there anything else I'm missing here?(besides not yet having the motor)

hobby67stepside · 07-15-2003, 12:32 AM

There's quite a lot of differences in these mounts. Check with vendors, junkyards, and acquaintances who have done the switch

*Randy70C-10* · 07-15-2003, 08:46 AM

I'm pretty sure that the 73 crossmember will bolt right up. I've never tried it, but it's been talked about before.

FrankHoy · 07-15-2003, 09:20 AM

I believe this is a direct bolt-in.
I spoke with one of the vendors on this when I was first trying to decide how to make my desired 4X4, he definitely knew what he was discussing(NOT LMC

). He recommended it, due to the older style BB mounts being considerably more expensive. If anything, you may need to redrill one set of the holes on the frame I do remember that he said the width is the same.

jays68yak · 07-15-2003, 10:17 AM

teeitup has some bb stands the 67-71 ones.

07-14-2003, 10:12 PM	#1
67 SS Registered User Join Date: Jun 2002 Location: NW ARKANSAS Posts: 258	motor mount Q I might be finally getting a big block to drop in my old 67.I allready have a 4:11 posie out of a 71-72 and a tranny crossmember out of a 71 3/4 ton automatic(the 67 had a 6/3 on tree).I'm planning on putting the front crossmember out of a 73 up under it and using the 73 up motor mounts.Will the 73 up crossmember be a direct bolt on?Are the 73 up motor mount towers different between a SB and BB?Is there anything else I'm missing here?(besides not yet having the motor)

07-15-2003, 12:32 AM	#2
hobby67stepside Registered User Join Date: Dec 2001 Location: NW Iowa Posts: 952	There's quite a lot of differences in these mounts. Check with vendors, junkyards, and acquaintances who have done the switch __________________ '05 2500 HD Silverado 6.0 liter '97 2500 4X4 454 eng '92 2500 4X4 350 eng '78 K20 4X4 400 eng '70 Boss 302 (owner for 27 years) '57 Ford shortbox 383 stroker TH350 tranny '23 T-bucket (built in '78) '02 Explorer '67 C-10 short step NW Iowa

07-15-2003, 09:20 AM	#4
FrankHoy Registered User Join Date: Aug 2002 Location: Des Moines, IA Posts: 154	I believe this is a direct bolt-in. I spoke with one of the vendors on this when I was first trying to decide how to make my desired 4X4, he definitely knew what he was discussing(NOT LMC). He recommended it, due to the older style BB mounts being considerably more expensive. If anything, you may need to redrill one set of the holes on the frame I do remember that he said the width is the same. __________________ 72 Cheyenne 2wd LWB 402/350 CC/PS/PB/AC Tilt/Tach (upgrading to 4X4 402/700R4 CC/PS/PB/AC Tilt/Tach PW/PL) 71 Custom Deluxe 350/350 Tilt/PS/PB 00 Blazer

07-15-2003, 10:17 AM	#5
jays68yak Registered User Join Date: Oct 2002 Location: Gilroy, CA Posts: 1,454	teeitup has some bb stands the 67-71 ones. __________________ 1969 Chevy Project SWB Fleet, 20s, 5.3, t56, in the weeds. 1970 Chevy Truck cab on a 1979 Jimmy frame-8.1 liter 496 bbc/sm465/np203-jeds doubler-np205/d60/14bff Welded/42 tsls on recentered H1s 1998 Chevy Crew Cab K3500 SAS'd with hpd60, links and swayaway coilovers. 8.1l vortec DD/towrig "I like long walks, especially when they are taken by people who annoy me. "

07-15-2003, 08:46 AM	#3
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	I'm pretty sure that the 73 crossmember will bolt right up. I've never tried it, but it's been talked about before.



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