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Author Topic: Engine Swap 86 350 into 78 C20  (Read 3877 times)

Offline Johno

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Engine Swap 86 350 into 78 C20
« on: May 17, 2008, 09:41:42 am »
 Having problems with flex plate bolt pattern to trans. Weight is in wrong spot to line up with trans.78 C20 350/350 AUTOMATIC
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Offline VileZambonie

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Re: Engine Swap 86 350 into 78 C20
« Reply #1 on: May 17, 2008, 09:45:58 am »
If you have a one piece rear main seal on the 86 engine you need the 86 flexplate.
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Offline Johno

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Re: Engine Swap 86 350 into 78 C20
« Reply #2 on: May 17, 2008, 12:06:17 pm »
I have 86 flex plate but the weight is in the way . When you line up converter weight covers the hole
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Offline Blue 82

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Re: Engine Swap 86 350 into 78 C20
« Reply #3 on: May 17, 2008, 01:43:41 pm »
The weight goes toward the engine side
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82 stepside 2wd 355/th350/3.08 posi

Offline HAULIN IT

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Re: Engine Swap 86 350 into 78 C20
« Reply #4 on: May 17, 2008, 02:09:13 pm »
Please explain in a little more detail or post a picture or two. Allot of guys are glad to help, but need to understand what you got going on. To your knowledge, What is the engine out of? What engine is the flexplate from? Is this a stock type GM torque converter from the truck? Lorne
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Offline Johno

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Re: Engine Swap 86 350 into 78 C20
« Reply #5 on: May 17, 2008, 05:24:14 pm »
They have the weight facing trans.  I will flip it over and give it a try Thanks.
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Offline Blue 82

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Re: Engine Swap 86 350 into 78 C20
« Reply #6 on: May 17, 2008, 08:30:57 pm »
the flexplate should be stamped "engine side"

this is what the tranny side should look like

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82 stepside 2wd 355/th350/3.08 posi
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