340 carburetor selection advice

The 73 340 was nowhere near 9:1 compression "stock", so if it's truly 9:1 It AIN'T stock. So let's get that out of the way. I agree with either of the above choices. The Thermoquad or the 3310 750. Be ready to tune either and the Thermoquad has a steeper learning curve, but IMO, is superior.