Superjet vs sitdown 144mm pump differences?

bored&stroked

Urban redneck
Location
AZ
So I'm putting together a RN. It came as a hull with all the parts in boxes. My buddy had pulled everything for his rickter build, then bought and stripped a cheap VXR for its drivetrain and put it in this RN for his lady to ride. Fast forward to now, everything was pulled except the pump. He had upgraded the rickter to a magnum, so I have the original superjet pump I want to put back in [has a nice prop in it already]. Problem is, the OG pump is missing the tail section. No biggie I think, I'll pull it off the VXR pump and swap it over. Wrong. Seems they have different diameter bolts holding the pump together?? Is one better then the other? If not I guess I can just swap the prop onto the complete vxr pump and keep running it, otherwise I have to located a tail section...

IMG_0931.jpg
 
other than the water outlets and the large fitting on some stators,it should interchange i thought.

you mean the 4 long bolts have different diameter? sure it's not a 148/155mm?
 
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