The original carburetor was a Quadrajet,
Carburetors and Throttle Linkage, 1973 Buick Chassis Manual (Scroll Down to Rochester 4MV Page 6E-120)
This is a steal...
Here is the TA Performance Catalog page for fan shrouds,
If you do not have a TA Performance catalog, download a pdf here,
https://www.taperformance.com/catalog.html
One of the first things to check when the engine runs hot at idle and low speed is ignition timing. The initial timing is...
The Switch Pitch ST300 worked like this. At closed throttle idle, the torque converter was in high stall. Off throttle the converter went to low stall. More than 60% throttle put the converter back to high stall. Close to full throttle activated the kick down.
At the transmission, the...
There are two tabs on the radiator support. The bottom of the shroud has two elongated holes that fit over the tabs. The shroud is bolted at the top. You can fabricate rubber isolators that fit over the tabs to tighten it up in the holes. I just cut a piece of fuel line hose to make my own.
Maybe the best solution is to change the fan. My 70 GS455 uses the common Buick 18" X 7 blade clutch fan.
https://www.v8buick.com/index.php?threads/7-blade-clutch-fan.396160/...
Could also use a 10 tooth (Green) DRIVE gear,
https://www.amazon.com/Governor-Speedo-Speedometer-54684BC-8639906/dp/B0CVYTNM7V?gQT=2
and a 27 tooth (black) DRIVEN gear...
Are you sure? There are 3 different water pumps that fit the 215-300-340-350. They will all bolt up, but the wrong one can create all kinds of fitment/alignment problems.
Bruce Roe makes an electrical control box for the Switch Pitch transmissions. With three timers and a vacuum switch, it mimics the original control Buick intended. Read more below.
https://www.v8buick.com/index.php?threads/s-p-st-300-bruce-roes-electronic-controller.190075/#post-1663402...