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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: farrisrocks7 on December 12, 2010, 10:51:33 pm

Title: 3 speed manual to Turbo 350 auto
Post by: farrisrocks7 on December 12, 2010, 10:51:33 pm

I am thinking about swapping out my manual 3 speed(on the tree) to a turbo 350 auto in my 80 chevy stepside.  Just want to cover my bases.  Please correct me if I am wrong but I'll need to change or add the following:
Radiator
Trans cooling lines
Carb Kickdown
Flywheel/Flexplate
Crossmember
driveshaft
Now, will I also have to change out my steering column or will my 3 speed shifter work??  If so, how hard is that?
Thanks in advance!

Title: Re: 3 speed manual to Turbo 350 auto
Post by: Captkaos on December 12, 2010, 11:01:17 pm

You need a radiator with the cooling in it and lines.
The crossmember will work.
Driveshaft should work also if the TH350 is a short tail.
You have to disconnect the shift rods off the column, but I have heard people using them.  I would swap it out.

Title: Re: 3 speed manual to Turbo 350 auto
Post by: farrisrocks7 on December 13, 2010, 01:07:41 am

Will I have to move the crossmember?

Title: Re: 3 speed manual to Turbo 350 auto
Post by: Grim 82 on December 13, 2010, 09:51:44 am

Don't forget to remove the pilot bushing from the end of the crank.

Title: Re: 3 speed manual to Turbo 350 auto
Post by: zieg85 on December 13, 2010, 09:54:17 am

Quote from: farrisrocks7 on December 13, 2010, 01:07:41 am

Will I have to move the crossmember?

No the cross member location is the same when using a short tail shaft TH350.  The drive shaft is the same as well