The two main reasons for stripped carburetor body bolts is 1) over tightening and/or 2) allen bolts too short.
BRC has Allen Bolt Kits consisting of (89) bolts & (23) lock washers - broken down as follows:
(16) #18-8 S/S 6mm Socket Cap side & bottom bracket bolts
(16) #18-8 S/S 5mm...