Rc Monster Electric Conversion

[painter]

Hey. Figured hear with you who knows on what's up.
Should convert one baja 5b.
Bought Rc Monster Electric Conversion Kit - HPI Baja 5B and a new ss.
Should run with Castle motor / esc.
Will buy as large lipo as it can fit so I get long runtime.
What contacts should I use, Traxxas TRX, 8mm bullet or what do you recommend.
I think i go for 8 cells lipo(2x4 cells)
Is there anything else I should consider before I start to build?
Thanks