Take a guy like Dick Jessie (photo above), an independent racer, like all of the Chevy racers, after GM bailed out of racing in '63. Would you build a legitimate (as in legal) Factory Experimental car or a Match Race Car? Remember, there was no factory support, no free cars, no free engines, it was just the individual racer and his own wallet. In many ways, NHRA made the decision for you, they "forced" you to go Match Racing. Here's how that happened.
he 1st NHRA National Event was in 1955, held in Great Bend, KS. The next NHRA National Event did not take place for a year, in 1956, held in Kansas City, MO. A year later (1957), the National Event was held in Oklahoma City, OK, then it was moved to Detroit, MI in 1959, and eventually, to Indy in 1961. So, from 1955 through 1960, NHRA held one National Event a year (and I'm not sure they ran a National Event in 1958).
It's important to grasp this. If you built a NHRA class legal race car, you basically had only one race a year where you could race it. Sure, you could (and did) race your car at your local or regional tracks, but many (or most) drag strips either didn't follow the NHRA Rulebook or had rules of their own. To tie up a lot of money in a car that fit the NHRA class rules might put you in a disadvantage at non-NHRA National events, where the track allowed modifications that did not follow the legal NHRA permitted mods, like removing the front bumper, moving the battery to the trunk, running drag slicks instead of a 7-inch tire, etc, etc.. Local tracks rarely enforced NHRA stock class rules with any intensity, rarely even pumped the engines to check displacement, almost never had a tear-down for the winner. After awhile, a lot of legal NHRA racers saw the light, if you can't beat 'em, join 'em. Believe me, it's not much fun to race your NHRA legal S/S Chevy 409 and get beat week in and week out by cars that you KNOW were not legal NHRA S/S cars, simply because the tracks did not mandate that requirement.
Now we come to 1961, an important milestone for NHRA. They held more than one National Event in 1961, the Winternationals was introduced in Pomona, CA that year. So now a legal NHRA car had at least two events he could race at. The next time that NHRA expanded their National Events was in 1965, when they added the Springnationals in Bristol, TN and the World Finals in Tulsa, OK. In 1962, the Factory Experimental Classes were introduced so in 1962, 1963, and 1964, you had a maximum of two events a year (Pomona and Indy) where you could race your "legal" FX car. What else could you do with it between the Winternats in February and the Nats in September? Well, you could match race it, and you could do that (theoretically) every weekend if you wanted to. You had to make a decision, you could take your "legal" FX car and race it twice a year at NHRA National Events (and get hardly any cash) or you could race it 20 times a year and make some real cash, and you did NOT have to worry about tear-downs or even keeping the car "legal". And better than that, you didn't need to have a legal FX car, you could "build your own"; you could buy a Nova or a Chevelle, stick in your own engine (with a stroker kit of course), and have some real fun and even make a few bucks.
For the independent Chevy and Pontiac racers in particular, this was hardly a decision...