help me build my first race car

Roll bar needed,not a cage,in a car running 10.00 to 10.99 if firewall is un altered and car doesnt exceed 135mph.I will bee going for the A Nitrous record for slant 6,,10.93 @ 125 mph and my roll bar is legal.Has Been 11.43 all motor at 115 mph so I will only bee giveing it a 60 shot first time out.Then maybee a 90 shot.Got over 400 runs on this motor so I am going to spray and pray.If it lives after that and I get the records on spray,I will tear down ,up compression,freshen up and try to lower my all motor records A/gas ,B/gas,and C/gas records I have.I am under 300 rwhp,,,,Wonder what the car would do with a 450 hp small block?
Guzzi Mark