S10 swap question about drive lines

[Sim6]

So I have an 87 s10 frame with a two piece driveshaft. I put in a sbc and turbo 350. I meassured my short shaft to be trimmed at 8 3/4". Driveline shop here said to meassure from the center of the yoke u-joint coming out of the trans back to the center of the holes that the carrier bearing bracket bolt to. With that they said before measuring pull the out 1" from being in all the way before I take the measurement. That's where I get my 8 3/4". Hope that makes sense they called me yesterday saying before they do any work they were afraid that a shaft that short would probably vibrate/ not balance properly being that short. He suggested a one piece shaft.

So my question is how short are some of your drive shafts? Any vibration?

The problem with going to the one piece is having to make/move a new crossmember that wouldn't be in the way of the driveshaft. Thanks in advance.
Jeff

[Sim6]

Sorry, posted in wrong section.

[joedoh]

one piece shaft here, I moved my 4.3 4l60e back 5 inches and shortened the longbed one piece 6.5 (to account for lowering leaf springs and blocks moving the driveshaft closer to the trans.

get a one piece from either an s10 longbed or even a silverado long bed 99-03 (they are the longest factory one piece driveshafts) and make sure you leave an inch or two of stickout at the trans.

[Sim6]

Joe,
was yours a one piece from the factory? If not where did you move the crossmember? Any pic's?

[joedoh]

yes, I used a 1999 longbed and it was one piece from the factory. go get a one piece and cut out the carrier crossmember.