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06-27-2010, 06:09 PM
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#1 |
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Registered User
Join Date: Jun 2010
Location: Traverse City Michigan
Posts: 10
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Motor Mounts
What have you guys used for big block swaps. i bought the block portion from summit and when i got them in the mail i knew they were wrong. what have you all done. Truck is a 72 motor is a 402
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06-27-2010, 06:50 PM
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#2 |
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Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: Motor Mounts
Well, we used a set of stock big block mounts from a '73 C-20 to put a big block in my '71C-10.
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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06-27-2010, 08:56 PM
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#3 |
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Registered User
Join Date: Jun 2010
Location: Traverse City Michigan
Posts: 10
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Re: Motor Mounts
OE is way off the charts in price. anyone have a aftermarket suggestion ?
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06-27-2010, 10:38 PM
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#4 |
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Registered User
 
Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: Motor Mounts
I DON'T HAVE ANY IDEA ON YOUR BUDGET BUT YOU CAN MOST ALWAYS FIND A SET OF 72 ONLY BB STANDS FOR UNDER $200. THEN YOU CAN USE ANY BB CLAMSHELL TYPE MOUNTS UP TO AT LEAST 86. WITH THIS ECONOMY BEING IN THE SH!TTER LIKE IT IS, YOU CAN PROBABLY FIND EM FOR HALF THAT. INVEST $25 FOR A PAID SUBCRIPTION & THEN PUT A WTB ADD ON THE PARTS BOARD. WELL WORTH THE $ & IT'LL COME BACK TO YOU RIGHT AWAY.
 JOHN
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES//LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST Last edited by junkyardjohn; 06-27-2010 at 10:41 PM. |
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06-28-2010, 12:19 AM
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#5 |
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Registered User
Join Date: Mar 2003
Location: San Francisco, CA USA
Posts: 2,454
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Re: Motor Mounts
Unless you are doing a stock resto, use the 73-up mounts. Their only downside is that you have to drill a couple of new holes in the frame. For the difference in price, it is time well spent.
Ray |
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06-28-2010, 09:32 AM
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#6 |
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Registered User
Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: Motor Mounts
IT'S A LITTLE MORE THAN THAT RAY. IVE DONE IT. HONEST. 73 UP BB TOWERS ARE ABOUT AN INCH TALLER THAN 72 BB MOUNTS WHEN OUT IN A PRE 72 TRUCK THAT HASN'T BEEN CONVERTED TO A 73 UP CROSSMEMBER ASSY. (THIS ISN'T SOMETHING I'VE HEARD, OR READ, OR HAD A FREIND THAT SAID IT WOULD WORK). (THIS IS FROM MY OWN PERSONAL EXPERIANCE) IF IT HAS BEEN (CROSSMEMBER CONVERSION) CONVERTED, IT'S A PRETTY SIMPLE BOLT ON AFFAIR. YOU CAN MAKE THEM WORK BUT IF YOU BOLT THE BOTTOM SIDE IN.. THE TOP WILL BE ABOUT AN INCH HIGHER THAN THE FRAME RAIL. YOU CAN OVERCOME THIS BY PUTTING A SPACER ON TOP OF THE FRAIMRAIL BETWEEN THE FRAME STAND. THEN YOU'RE BB SETS AN INCH TOO HIGH & THE GEOMETRY ISN'T CORRECT. OR YOU CAN HEAT & BEND THEM TO FIT, AGAIN RUINING THE GEOMETRY, MAKING BOLTING UP THE MOTOR A REAL PAIN. 73 UP CROSSMEMBERS ARE ABOUT AN INCH DEEPER THAN 67-72 CROSSMEMBERS & THE MM TOWERS REFLECT THAT. HONEST.. I HAVE SEVERAL SETS OF EACH STYLE OUT IN MY SHOP. IF WHAT YOU CLAIM WAS INDEED CORRECT.. DON'T YOU THINK EVERYONE WOULD BE USING THE ULTRA COMMON 13 YEAR PRODUCTION, $12 73 UP TOWERS INSTEAD OF SPENDING $150 OR $200 ON 72 ONLY BB TOWERS?? OR DO YOU FIGURE EVERYONE ELSE IS JUST PLAIN STUPID & YOU ARE THE ONLY ONE THAT EVER STUMBLED ON THIS LITTLE GEM OF KNOWLEDGE???
  JOHN
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES//LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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06-28-2010, 11:44 AM
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#7 |
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Its Topless Season!!!!
Join Date: Jul 2007
Location: fort worth, tx
Posts: 1,657
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Re: Motor Mounts
Subscribed to this as I am also going BBC 454 from a 78 to my 67 but trying to decide if I should go with 68-71 or 72 towers.
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06-28-2010, 12:05 PM
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#8 | |
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Registered User
Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: Motor Mounts
Quote:
JOHN
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES//LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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06-28-2010, 04:22 PM
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#9 |
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Registered User
Join Date: Mar 2003
Location: San Francisco, CA USA
Posts: 2,454
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Re: Motor Mounts
Junkyard is right. I had previously done a crossmember swap on the truck as part of a disc brake conversion and didn't think about it being different.
 Ray |
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