i went 12.113 in my rex with
b20 block $500
gude racing ls head $750 used
cable gsr tans $700
quaife diff $800
aem enginemanagement $1000
wiseco 11:1 pistons $300
eagle rods $300
crower 402 cams $400
tilton twin disk clutch $1000
dss stage 3 axles $750
bogart 13x9 wheels $400
24.5x8x13 m/t slicks $300
dsm 450 injectors $free from friend
walbro fuel pump $150
nitrous express direct port n2o kit $800 sprayed 200hp
plumbing for fuel/ nitrous $200
total $8500 or more invested
plus the car and the cage and the seats and the belts
countless other parts and gutted interior
i would say that you can run 11s for about 4-10 k just depends on the quality of the build i spent to much on my car but i also bracket raced it every sat night for 2 years and only went thru spark plugs nitrous fuel and tires till i sold my motor to build a 800+ hp gsr motor and i dont have it completed due to funds
i do have the complete dry sump system and a gt42
now just need the block sleeved and a massive fuel system to run methanol the rest is all little shit when you get to this point.