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4x4 f100 big block to small block conversion

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4x4 f100 big block to small block conversion

Old 09-27-2015, 06:43 PM
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Default 4x4 f100 big block to small block conversion

My son and I are tempting to put a 302 in his f100 1974. The big-block has seen it days. Anyways we are stuck at the flywheel clutch. I have a bell housing from a 1988 bronco straight six that bolts up. The flywheel we have is off the 302 157 tooth. I think we need a 164 tooth flywheel.

My question is what flywheel and starter and clutch do we need to make this happen. Also what motor mount perches do we need? The f100 has a manual transmission. I believe its a 351 big-block we took out?

Thanks for any help..
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Old 09-27-2015, 08:19 PM
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Check the imbalance for the flywheel for matching your motor year. Imbalance changed from (I think the weights are) 28 ounce to 50 ounce in (I believe) the early 80's.
So, flywheel imbalance has to match the motor imbalance requirement.
Just thought I'd mention that part in case you're mixing years.
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