Tolerance and finish requirements for a torque plate

[wranglerunner22]

Im going to be getting a 4g63 torque plate made and I am wondering if any knowledgeable machinists on here can share with me what tolerance and finish I should have the torque plate made to.

Help would be great,

Thanks everyone.

 

[BogusSVO]

Goodson machine supply has the torque plat, ready to go For $300

 

[wranglerunner22]

If I wanted to buy one I would have done it already. Thanks tho. Seems like a good price for somone that doesn't want to make their own.