porting heads
You can do pretty much whatever you want to do to your engine, in the modifieds and stock cars, as long as you are willing to sell for the engine claim.
The late model rules have gotten very convoluted and confusing.
If you are running stock unported heads you can run yada yada carburetor. If you have stock heads that are ported you have to run yada yada carb. If you are running the IMCA spec engine, which the last I knew, all IMCA late model engines had to run Brodix heads, you have to run yet a different carb etc.
The modifieds have always been pretty wide open with the engine rules, the only limitation being no aluminum heads, and limited to one carburetor.
Same with the IMCA stock cars, exept they now have to run the 350 Holley 2 bbl carb, which of course IMCA gets a kickback on each one sold, as well as they do on all the McCreary EC2 and G60 racing tires.
I find it hilarious that most of the hobby stockers around here are running as fast or faster than are the IMCA cars.
All these rule changes have caused car counts to drop off considerably and other rules changes on the modifieds are placing them out of the hands of the average Joe that wants to race.
I think the next move with the IMCA Modifieds will be to go to a spec chassis, like using the Ford Crown Vic frames, as they are the only full frame front engine rear wheel drive chassis thats on the market now thats worth a crap.
Other things that are running people off are the fact that guys like Wayne Larson, who races all over the country and has an unlimited budget has the ear of IMCA, and if they want a change in the rules, they get it.
Like bead locks. Bead locks became an issue with the Modifieds the year after I retired from racing (1992). There was a big debate about tire pressures, and guys wanting to run bead locks so they could run on 5-6 lbs of air in their tires.
So since the high rollers wanted the bead locks, They got ok'd.
Whats funny is that McCreary said the G60 was designed to run with 20 lbs of air, and not low pressures with bead locks.
The simple rule would have been to just check the air pressure of the rt rear tire on the top 5 cars at the end of the feature. Not enough pressure in the tire, you are disqualified. Simple rule and surely a lot less expensive for the average racer.