Posted 21 May 2020 - 03:01 PM
Posted 21 May 2020 - 10:12 PM
I have a 68 Firebird with the two speed powerglide transmission I need to know if I drop the transmission with a TH 350 bolt right up
First you need to verify exactly what trans & engine you have. Is the 350 engine a Pontiac, Chevy, Olds, or Buick ?
Is the trans REALLY a Powerglide ? Or is it actually a 2-speed BOP trans, commonly called a Super Turbine 300 (ST-300) ?
A BOP engine requires a BOP TH350. A Chevy engine has a different bolt pattern, requiring a trans with a Chevy bolt pattern.
BUT, there are conversion plates which allows mating Chevy trans to BOP engine, & BOP trans to Chevy engine. I made one out of 1/8" plate. The bottom & dowel pin holes are in the same locations, for Chevy & BOP.
Don't know about driveshaft length. I've never switched from ST-300 to TH350. Some of these guys who have made the switched can tell you. .
Posted 23 May 2020 - 05:30 PM
Are there distinguishing marks on the transmission or just buy the serial number
Posted 26 May 2020 - 12:41 PM
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