Need help choosing Weld Beadlocks for ´15 GT

[illimar]

I am looking for rear wheel and tire set for drag racing. Need something to handle freshly installed ROUSH supercharger

Tires - M/T ET Street® R P305/45R17 or P315/50R17.
Wheels - Weld S76 or S77 Beadlock.

Can anyone help with choosing the correct options as I dont want to make a mistake ?
https://www.weldwheels.com/product/s...dlock-17x10-5/
Which Backspace ?
And is there anything else I need for correct install (spacers etc.) ?

If anyone has photos of their car with S77 Beadlock (or some other Weld Beadlock version) and M/T ET Street® R tires, please share !

Thanks!

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[Drsmith33]

I have a set of 305x45x17 et street r’s and a set of 18x6 MT skinnies for the front. Mounted on race stars. Needing to sell them. Pretty much brand new. One pass down the track and 20 mile drive to and from the track on the tires. Let me know if you’re interested. My car makes a little over 900whp and they did just fine for me.