Until I get my shortblock built up, can my 420a hold a 75 dry shot safely? My mom is cracking on me and wants to race me with her car (06 TL) and I really dont want to loose to my mom that wouldnt be good. I currently have a header intake ported tb plugs and wires full 2.5'' catback and short throw so I dont know how close it will be. Whats everyones opionion on Jackson Automotive shortblocks as opposed to SBR.