changing lug pattern

where could i get a rx7 rearend hub drilled to a 6 lug?

machine shop?

if you have a 2nd gen RX7 IRS, you cant, the 6 on 5.5 pattern is too big for the rear hubs.

Redrill the front axles to 5 on 4.5. If you have a 4 lug IRS rear, you can buy 5 lug hubs and rotors to replace the 4 lug.