Three things from the assembler bleachers
1 I wouldn't look for the "typical" NASCAR pan. The road race Nascar pans are probably different than the roundy round ones. I know they use different styles of radiators for each type of track I'm sure the pans are specific.
2 Even for my FE the pans are typically cheaper than $1k unless you are going for a billet pan.
3 This thread is trending too much towards you build so I imagine DB Cooper and crew will be jumping in soon to get us back off topic.