I do to want to muck up the thread by adding two cents but the ever so often asked questions about which TQ to use is broken done into these two general categories.
Small 1.38 primary for 273, 318 & very mild 340 or 360 engines.
Large 1.50 for 340 and up.
The race TQ should be used on a race engine and bigger the better for that carb.
Second is the earlier the better due to less emmisions in the cars carb. Truck TQ's have less smog equipment. Skip the first year TQ due to different metering style of the carb. It is also the same as the 1000 cfm race carb.
We now continue with the info thread at large.
Thank you for your patience.