another cam question

FWIW,

1. You can get 3.73 gears from the after market if you want them.

2. When you use a carb that is too big you wind up jetting UP. The reason being is that the air velocity through the venturi of the carb is slower creating less signal to pull fuel, resulting in the need for bigger jets. And, the opposite holds true too if the carb is small you jet down. For example; On my 360 if I am using the 600 cfm carb I had to jet down to 64's from the stock 69's and when using the 725 cfm Road Demon I had to go up to 78's from the stock 76's.

3. You can't compare an 800cfm TQ to a 770 Holley to make a judgement on carb size. The TQ has tiny primaries and huge secondaries and on a stock 340 the secondaries (vs the holley have the same size primaries and secondaries) never opened all the way. The reason for this size of a carb was to provide addequate capacity for race classes that required the use of stock carbs.

IMHO, if you have the 770 try it but if you are going to buy something and the car is primarily a street car stay with something in the 650 range.

4. the cam you are looking at will be a good choice but you may want to consider the XE262H (p/n 20-222-3). This is one of the new technology fast ramp cams that has approximately the same duration but quite a bit more lift. I am using the XE268H cam and my 360 puls clean from below 1500 rpm and is super strong from 2-6K rpm.