392 in a 70 Duster

The catch is Qa1's (I believe it started out as magnum force but if I am wrong someone will surely correct me) reputation has not been good for actually staying together. They have been bought out I believe so maybe quality has changed but in the past there had been several issues of welds breaking. I have the RMS setup and it is nice. Hemi Denny also has a nice product and can tailor it to your needs.