Tom depends on the combo really but most are 2700-3000. Likely one or two just over 3000 and a couple under 2700. Most guys opt for 400+- cubes in a small block which keeps them above 2700. BUt some of the guys who crossover from comp are lighter and come in a 358 or fewer cubes. We have one on the west coast at 331 cubes. That car runs 8.teens pretty consistently. The car we run is 2870 at 417 cubes on the east coast a tad bit lighter out west. Although this year looks like we will be the same in both places. There are a few things that add weight by rule to the combos and some that subtract weight. Not just heads, oil system, intake material, number of carbs, trans, resr suspension etc. Some combos are more friendly on weight than others for sure. Originally the rules package we use now was written by a group of SB Ford guys. So they had a decided advantage, although I will say NMCA is racer friendly and has done a good job at evening up the rules package each year.

A pic of the powerplant and you can see the intake dilemma and one of the car