mazda bed length

i have a bagged and bd single cab b2200 and im really wanting to make it an ext. cab. are the beds on the single cabs and ext. cabs the same? thanks

No they are not and the wheelbase is different also the single cab bed is 6'4" and the extended cab is 6'2' the single cab bed has eight mounting point on the bed and the extra cab has only 6 the wheel wells are in completely different places also the single cab is 26 inches from the bulkhead to the beginning of the wheel well and the single cab is 12.5 inches from the bulkhead to the beginning of the wheel well hope this helps the measurement may not be exact on the wheel well place meant but they are with in a inch or two i was going by memory