race to pump gas mix and converter stall?

It looks like you will have about a 8.11 DCR which will probably run fine on non ethanol premium gas only, no race fuel required.

What type of street driving do you have planned for it? Are you going with a wide ratio gear set in the trans?
street driving like friday night cruising, i may but very very rare chance drive it to work which is 35 miles of highway once or twice. the trans will probably be stock style ratios.