Ill say this ,a lower performance car will bring more money than a flatout fire breathing race car, and ya cant go wrong with a 340 and iron case 4 speed in a 74 or under duster, dart, scamp, demon etc
When I am bracket racing, the "slower cars" often are victorious, as the quicker has to run the slower down without breaking out and they quite often redlight in eagarness. Its absolute fun.
I would still like to build an all out 10-11 sec car eventually in a few years when I pull in some more currency.