Chevy Caprice works for the 1951 and newer Kaisers. Look for something with the same wheelbase as the early K-F cars. I'm wondering if any late model Honda Accords or Nissan platform would work. I have a 2010 Honda Accord and I sure wish I could put something like that under my '51 Kaiser conv. body The frame on my car is all beefed up and I will probably end up using a later engine and transmission and front end and keep the Kaiser frame but you can't beat the power, handling and good gas mileage of the later luxury cars.