It is your car so build it the way you want!When I found my MPC '73 Caprice I decided to replace the engine(which was a gluebomb with a 396 from the Revell '66 Chevelle(didn't dig the old axle through the engine block thing)>I also replaced the front suspension and rear axle using the Lindberg '62 Impala kit.I painted the body gold and did the black vinyl roof thing .Came out great!