i agree 100% with Zip..do it yourself and enjoy the build and your kids will have more fun helping and be a lot proader of it and what they will be part of.i do everything myself and maybe everything isn't perfect sometimes as it would be from a pro shop but i can not say enough on how good it feels when i beat a pro built/high money car at a car show or at the track..i don't feel there will be a big differance in what you get for it between the C/M and M/S if they are nhra certified for same time..
build yourself and have fun..