Are small block 8v oil pumps the same?

[boffer8]

Hi all,

i was wondering if all small block 8v oil pumps were the same (1.2/1.3/1.4/1.6)?

if they are the not the same what is the difference? do they run different oil pressures or something? all the bolt holes are the same and the fitting etc so cannot see any physical difference, maybe a running thing?

cheers for your help in advance.

cheers
ben

[garyc]

the 1.3 and 1.4 pump drives are different, I do know that. 1.4 is hexagon 1.3 is 2 flats iirc.