1967 Buick GS 400 Restoration

[68 wildcat]

I'M not surprised he bailed on his thread. As far as driveshafts go, My 68 Wildcat has a 2 piece driveshaft with 4 ujoints and a center bearing support. Some manuals call the Link Yoke a C.V. joint as you mentioned,( I've seen both definitions used in my Buick Chassis Manual) but in reality the link yoke has 2 ordinary ujoints and a spring loaded ball and seat arrangement to keep the whole thing centered. Plans are to replace the 430 with a built and bored 455 this summer that should dyno around 550 Hp. so I'm kinda hoping the driveshaft will be up to the task.

[bob k. mando]

erm, i'm pretty sure those Buick 2 piece shafts have a rubber coupling between them.

i'm wouldn't trust that 50 year old rubber to a 500 horsepower engine.

and you DEFINITELY need to install a driveshaft collar up about a foot behind tail of the transmission.

or, this is Bob's idea:
https://www.teambuick.com/reference/driveshaft_loop.php

here's Yardley's article on rebuilding 2 piece shafts:
http://www.1badriv.com/hardway.htm#Driveshaft


i've put an entire RR tire and wheel underneath a fuel cell cage ( rule spec of minimum of 8" road clearance ) at speed and that was way more exciting than i wanted. that little escapade bent the LF frame horn up +6" and totalled the car. and i didn't even hit anything. i was just bouncing down the front stretch.

pogoing the rear end on a drive shaft would be way worse than that.

also, install a snap chain / strap on the driver's side of the engine. smashing the hell out of your carb and intake and hood is not going to fun if that mount comes apart.

i can't figure out where the article on the engine strap is, i could have sworn it was on BuickPerformanceClub but now i can't find it.

[68 wildcat]

I don't see the rubber part. There is rubber around the center bearing. Here's a pic... Read both articles and plan to install a driveshaft hoop for sure. The driveshaft mentioned in the excellent article seems to be different from mine with quite a few similarities. When the time comes, I will send it out. Thanks for the links!

driveshaft.002.jpg