im going with a th350 trans that should be here in a couple weeks

my question is my driveshaft...do i have to get a custom driveshaft made or will the factory one work?
anyone swapped their 4l60e for a th350 in here?

 

I think a 9" TH350 (aka long tail) is the same size, so you can use the same driveshaft.

Others have done it.

 

any way to find out for sure? right now i dont have either trans to measure

 

a driveshaft from an 82 camaro with a 200r4 trans will fit perfect

 

with which tail? short or long tail shaft th350?

 

A 9 inch tailshaft on a TH350 will allow you to retain the stock driveshaft.
If your having the tranny custom built then just ask them to put a 9 inch tailshaft on it.
I am getting ready to do a TH350/TH400 (have not decided yet) conversion myself and most of the builders I have looked into will build it with either tailshaft.