302 crank interchangeability
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Senior User
Joined: Jan 2003
Posts: 333
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From: Safford, Arizona
302 crank interchangeability
Hey guys, a friend has an 86 F150 2wd truck, 302 EFI. He tore up the crank. I have a couple of 302's. One is in an 84 LTD Wagon, with the CFI fuel injection, and then some old 302's. I figure the older style crank won't work, but will the crank from the CFI engine work as a direct bolt in? If they decide to just swap engines, can they use the 302 CFI block and bolt the EFI stuff (heads, etc..) from the 86 truck?
Thanks,
T
Thanks,
T
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
Off the top of my head a couple of things come to mind. First off, when yo say old 302, how old are we talking? A pre-1981 crank won't work for two reasons: one is that the factory imbalance is 28oz instead of the '81 and newer 50oz imbalance, and the other reason is that they also changed to the one-piece rear main seal at the same time.
So let's take a closer look at that '84. That engine should have the crank trigger ignition which has a sensor ring with 4 lobes on the rear of the crank. I don't believe that will cause an interference problem with anything on the later block, so it should be a traight bolt-in swap.
I also don't see a problem with going the other way, bolting all the '86 EFI stuff onto the '84 block.
So let's take a closer look at that '84. That engine should have the crank trigger ignition which has a sensor ring with 4 lobes on the rear of the crank. I don't believe that will cause an interference problem with anything on the later block, so it should be a traight bolt-in swap.
I also don't see a problem with going the other way, bolting all the '86 EFI stuff onto the '84 block.
