P7 mopar nascar block

There’s a website that deals in R5/P7 stuff and I haven’t seriously looked into it, but they show a complete motor wet sump for $10.500. I paid just under $8,000 for my crate. I know there are fitment issues to overcome, headers being a big one, but $2500 for almost double the HP? I think the 4 speed dart from Sweden that ran dragweek was a R5/P7. Sorry that is cast iron block and dry sump.