I'd say bail out on the splice and dice discount approach, and just build them in a few different stages and leave it at that. Sure, maybe you will sell fewer cars this way, but more likely over a longer lifecycle of your product. I think if you branch out to offering too many different engine platform options and suspensions, your car will just turn out to be run of the mill and no longer an exclusive offering. I say stick to your original base platform, approach, and design. Sell quality at a reasonable price. It is what it is.
