They must be really close to track and run a small truck to get by on 48 on truck fuel. I can’t run my f250 to circle city or the burg for that much worth out a trailer, closest two tracks to me. Depending on what you do spend on a motor and averaged out over laps I could the price being better or way worse. Figure valve springs alone every handful of races cost close to 1k for some decent but nothing special units. Overhead cam setups are easier on valve guides but nearly as hard on springs. The springs have to be much smaller diameter for ohc systems but not much less stiff. There aren’t really any ohc options out there either. LS or gen 3 hemi would really be the only alternatives, both pushrods. Coyote ford would be the other which is overhead cam but small displacement.