Big Block Motor Mounts/Towers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

6600DURAMAX · 10-15-2004, 07:56 AM

Bought a set of BB towers off of here (thanks 69 1/2 Six Pack Bee, they are really nice) But have run into some questions. When i lay they into the frame it appears they do not fit perfect and lay a little crooked. Do I have to drill new holes, I would have thought all the frames would be drilled from the factory to except either SBC or BBC? If I do need to drill holes that is fine but how do I know where to place the mounts??

Any help would be great, maybe someone has pictures of how their's looks

thanks

**CPNE** · 10-15-2004, 10:53 AM

When I did this using 72 BBC mounts on a 71 frame, we had to drill one hole in the crossmember. 3 holes (2 on framerail, one on crossmember lined up) and I'm pretty sure we used the forward (V8) position too.

Sorry no pics

6600DURAMAX · 10-15-2004, 01:19 PM

"forward V8 position"??? Still not sure if I know where to place them??

Any pictures

thanks

**1970 CST Short Wide** · 10-15-2004, 03:01 PM

I too am interested in this as I'm going to be doing this useing 72 mounts on a 70 frame

Pic would be nice

Thanks Duramax for starting this thread

**1971Stepside** · 10-15-2004, 03:15 PM

of the 72 BB stands. I will have to drill the hole in the crossmember once the engine is ready.

**CPNE** · 10-15-2004, 03:33 PM

Quote:

Originally Posted by 1971Stepside

of the 72 BB stands. I will have to drill the hole in the crossmember once the engine is ready.

Yes, what I said. Good pic. Notice the forward frame rail holes are used, not the rearward (i6 position) holes. Basically using the forward holes on framerail will align one of the lower bolt holes, the other will need to be drilled.

6600DURAMAX · 10-15-2004, 03:49 PM

Thats awsome, thanks for the pic. I know I can get it positioned right now.

Now just need to fire the motor on hte test stand before dropping her in....then its

time

thanks guys

10-15-2004, 07:56 AM	#1
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,111	Big Block Motor Mounts/Towers Bought a set of BB towers off of here (thanks 69 1/2 Six Pack Bee, they are really nice) But have run into some questions. When i lay they into the frame it appears they do not fit perfect and lay a little crooked. Do I have to drill new holes, I would have thought all the frames would be drilled from the factory to except either SBC or BBC? If I do need to drill holes that is fine but how do I know where to place the mounts?? Any help would be great, maybe someone has pictures of how their's looks thanks __________________ 1972 K5 Build - plans - LS3-6L80e-One Tons..... 1971 CREWMAX Build.....at body shop for couple more years

10-15-2004, 10:53 AM	#2
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	When I did this using 72 BBC mounts on a 71 frame, we had to drill one hole in the crossmember. 3 holes (2 on framerail, one on crossmember lined up) and I'm pretty sure we used the forward (V8) position too. Sorry no pics __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

10-15-2004, 01:19 PM	#3
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,111	"forward V8 position"??? Still not sure if I know where to place them?? Any pictures thanks __________________ 1972 K5 Build - plans - LS3-6L80e-One Tons..... 1971 CREWMAX Build.....at body shop for couple more years

10-15-2004, 03:01 PM	#4
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,101	I too am interested in this as I'm going to be doing this useing 72 mounts on a 70 frame Pic would be nice Thanks Duramax for starting this thread __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

10-15-2004, 03:15 PM	#5
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	Here is a pic of the 72 BB stands. I will have to drill the hole in the crossmember once the engine is ready. Attached Images __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

10-15-2004, 03:49 PM	#7
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,111	Thats awsome, thanks for the pic. I know I can get it positioned right now. Now just need to fire the motor on hte test stand before dropping her in....then its time thanks guys __________________ 1972 K5 Build - plans - LS3-6L80e-One Tons..... 1971 CREWMAX Build.....at body shop for couple more years



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