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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Trukk on May 25, 2009, 02:48:47 pm

Title: 78 to 86 Engine Swap (350)
Post by: Trukk on May 25, 2009, 02:48:47 pm

The bottom end is coming apart in my 78. I found a 1986 350 with 55k miles on it for a good price. Will this be a bolt in swap? Trans is the original TH400.

Mike

Title: Re: 78 to 86 Engine Swap (350)
Post by: fiyaweed06 on May 25, 2009, 02:51:02 pm

it should drop right in!

Title: Re: 78 to 86 Engine Swap (350)
Post by: Blazin on May 25, 2009, 03:47:29 pm

As long as the 86 is an auto trans too. If not you will need a flex plate for it. The 78 is a two piece rear main seal. The 86 is a one piece rear main seal.