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Re: SBC vs BBC motor mounts
There are many different profile clam shells. There are taller clams for some big blocks than others. I know because I used Suburban big block clams in a truck and it smashed the fuel pump on the 454. GM made the clams specific for both the engine AND the chassis it was going in. That being said, it is rare that any clam won't get the job done. Use all of your 1978 parts and you will be fine.
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