Well - depending on the engine, they are right. You can build a "claimer" 350 chev pretty dang cheap. Have to when the rules say a loser can buy your winning race motor for $250. Most basic stuff is comparable - blocks, crank kits and heads are where you can pick up a lot of savings. Even many of the Ford stroker kits use Chevy type rods, chevy bearing sizes, etc. Dart SHP chevy block based on 400 mains runs $1668 at Summit, Ford 351 block similar specs $2038. I think the Ford block will allow more displacement.