Installing 350 from a 86C10 into a 84 K10 With a 89 auto trans & transfer case

[Preston]

I have started the install and my first surprise is the flex plate doesn’t fit, ordered a new one yesterday. What else should I be prepared for?

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[Preston]

FYI I had installed a 89 motor transmission and transfer case and later found the motor locked up I think water got into engine after it was pulled and the rear cam bearing has locked up so I put head gaskets on the motor I pulled out of my 86 and trying to get the 84 4x4 on the road.

 

[Poppy 87]

If the engine is indeed an '86 model, it has the 1 piece rear main seal, thus a different crankshaft than the '84. I would make sure that the torque converter bolt attach points line up correctly to your new flexplate PRIOR to installing engine into vehicle

 

[Preston]

Thanks I will do that as soon as it gets here

 

[Preston]

Well my new flex plate came in today, it’s just like the one I pulled off the 1989 the center hole is too small. The motor I’m putting in the 84 came out of a 86 might not be a 86 so I need a flex plate with a larger hole in the center can anyone help me? Should I repost this somewhere else? When did they changed the size of the flex plate?

 

[Preston]

I think I can answer my own question the 1985 flex plate has the larger hole than the 1986 just need to return it