driveshaft diameter

[reddishdsb]

swapping from 7.25 to 8.75 the old shaft needs to be shorter i know, but I have an old shaft here that the length looks right but it is only 2.75 in diameter dont remember what it came out of but will it be strong enough?

 

[Fisher]

What is the rest of the combo?

 

[reddishdsb]

gonna buld a 390 stroker, 391 posi 904.

 

[Ben Drinkin]

In the words of a former girlfriend, you'll need a bigger shaft..

 

[reddishdsb]

Hate to ask her but will a 3 inch do?

 

[Fisher]

I have a 3" chrome molly shaft from Dr Diff with 1350 yokes. super piece. I have 525 hp and 550 TQ