I built this kit & the Grumpy Bill’s Vega at the same time. They are virtually the same kit with a few minor differences. Both are easy to build but not very well detailed. They are not replicas, because there are inaccuracies between these cars & the real ones. Frame has drive shaft & rear end molded in . Engine, transmission, engine bay, & interior are not same as real cars. If you want additions to your ‘70’s pro stock collection then they will do. I had fun building them. Not a lot of other choices out there. Buy them, build them, have fun.