Ah yes! The two piece driveshaft. If you have a 59-60 you are stuck with it. Sounds like you are on the right track Greg. The main thing is proper alignment. Keep the shaft leveled as per the shop manual. The 1350's are a good idea. I know of several people running the stock center bearing with no problems with potent 455's.
Outlaw Pontiac Racers Association"For Those Who Live The Legend"
Do it now fool! Life is short.
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ECM member.
2008 Outlaw Pontiac Drag Series Champion
MANDRA
Do it now fool! Life is short.
69 Grand Prix/3163lbs / IAII 535 w/ Tiger heads by Gaydosh....9.35@ 144 so far..  through mufflers. 1.26 60'.
Going back to track with pump gas engine....
My 60 Ventura retired to street/strip duty..
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