I am in rockwell nc(salisbury) doing narrowing,gear sets etc. narrow housing is $125. but must warn about resplined axles. have seen/thrown away many that are twisted in mild street use. any car with good traction will over time twist them off. any car that can run a 12 sec 1/4 would not be good idea, slower than that. I handle the same axles as doctor diff, bearings etc. can make anything that you could imagine, been doing it for 35+ years pm for phone number if interested or questions.paul