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#1
05-03-2026, 09:29 PM
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Motor mounts
Can somebody tell what these motor mounts fit and can I use them to install a 455 in my 70 Formula. These came in a box of parts that came with the car. Thanks
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71 GTO Convertible 455HO AT Canyon Copper |
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#2
05-03-2026, 09:33 PM
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Hard to tell what body style they came from, there should be a code stamped into them, Those later style mounts came in B-A-F, and G body styles that all differ slightly in hieght.
If they are F-body mounts they should work on your Formula with the correct style captured frame mounts.
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Jeff R 60 Jaguar Mark 2, 3.8L Automatic 67 Sprint Firebird 230 OHC-6 4-Speed A/C 1971 Fiat 130 Coupe 3.2L SOHC V6, ZF 5-speed 78 Catlina Safari, Pontiac 400 powered 77 Astre Formula, 215 Buick V-8 T-5 73 Lemans Safari, 400 4bbl 4-speed 71 Catalina Enforcer, 455 4bbl 05 Dodge Magnum 3.5L SOHC V6 06 Mallet Solstice #024 LS2, Now with a Tremec 6060 6-speed! 2012 F-150 Echo Boost (My local Ford Dealer SUX!!!) 2020 Dodge Charger Scat pack (recovered) |
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#3
05-04-2026, 12:09 AM
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^^^ Yup.
There's AT LEAST two different styles. He says there's several different styles, and I can't contradict that.. What I know from experience is that the Fullsize mounts are taller than the F-body mounts. I found that out the hard way. |
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#4
05-05-2026, 10:19 AM
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70-74 f-body don’t use that style mount.
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 66 GTO, 495, M22, Strange S-60 w/4.10 Sold new at Royal Pontiac (Dealer# 07-679) 70 Formula 400/auto |
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#5
05-06-2026, 09:51 AM
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There should be part #'s stamped on them that will identify what they are from... i started a thread not too long ago that someone posted some numbers. Google should help too.
Edit- https://forums.maxperformanceinc.com...d.php?t=882596 |
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#6
05-06-2026, 11:41 AM
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You can use them, just order the correct frame side mounts to pair them with. 70s have steel clam shell style frame mounts, later cars have a steel and rubber combo mount.
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"Those poor souls have made the fatal mistake of surrounding us. Now we can fire in any direction" 1970 Trans Am RAIII 4 speed 1971 Trans Am 5.3 LM7 1977 Trans Am W72 Y82 1987 Grand National |
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#7
05-07-2026, 11:15 AM
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They look too tall for Firebird. They look like "B" body mounts.
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#8
05-10-2026, 07:12 PM
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OK so we are saying these are not correct for 70 Firebird Formula . I media blasted them and can not find any numbers. Sorry guys but this will be my first time installing a motor.
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71 GTO Convertible 455HO AT Canyon Copper |
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#9
05-10-2026, 07:45 PM
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The metal mounts that bolt to the engine are NOT compatible with those frame mounts.
You need a pair of the 1970 rubber & steel motor mounts.
Part numbers are 2335 and 2336. They bolt to the engine block and sit down over that frame mount. Then a long bolt goes through the motor mount AND the frame mount (both) from front to back. |
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#10
05-11-2026, 10:47 PM
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My understanding. Here are the frame mounts used. https://butlerperformance.com/i-3164...tegory:1393553
Here are the engine mounts: https://butlerperformance.com/i-2445...tegory:1393553 This is what my 72 Firebird has. My 76 Trans am has those other ones pictures above. With the clam shell frame mounts. https://butlerperformance.com/i-3016...tegory:1393551
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 3:90 gear. 28" slick. Best so far 9.95@135 mph. 1.39 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exhaust 950 Quickfuel. |
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