HELP! Th350 to Which over drive tranny?

[chevyrestoguy]

Measure the tailshaft length per Tx Firefighter's suggestion, and then you'll know what direction you need to go in. Not having to shorten your driveshaft will save you a couple of hundred dollars.

Keep the Holley 600 carb, it's not too big, you'll be just fine. People tend to forget that the factory Q-Jet that they put on the 305 SB back in '85 was 650 cfm. If you're looking for maximum fuel mileage with a carb, a Q-jet is a good choice. Just remember that when you crack the secondaries, that all goes out the window. Bowtie Overdrives makes a kit called "TV Made Easy", and it has all of the adapters you need to hook the TV cable to your Holley linkage. As mentioned earlier, the adjustment of the TV cable is critical. It's not hard to adjust, but just make sure you do it before you decide to take the truck for a test run after the transmission install. You can smoke a 700r4 quickly if you don't.