Anyone know a water pump that fits?

[YMJ]

My 1275 (12G1279 block) build is nearing completion but I cannot find a water pump that fits.

The impeller of all the pumps I have bought so far always fouls on either the edge of the outer block casing or the No1 cylinder jacket.

Is there a pump available with the impeller set back into the pump rather than sticking out between 9-17mm into the block space.

To make matters worse, all the spare 12G1279 blocks I have around the place seem to accept all the pumps I have purchased so far....but, ironically, I chose the only block that doesn't to be my donor!

[Smiffy]

Just grind it out to clear...........

[YMJ]

but what went there in the first place?

[Smiffy]

A pump with a smaller impeller

[mk1]

The early 1300 blocks used what was at the time the standard "Mini" pump. This was a small impeller pump. Shortly after its introduction they went over to using the longer impeller "S" specification pump on everything. As has already been suggested simply grind your block out a bit until you have the clearance you need. It was a common mod in the late 60's & early 70's.

Needless to say that when the factory went on to using the largwer impeller pump across the range the tooling for the block was modified slightly.

[YMJ]

The actual problem was the extra head stud fouling the impeller. I just couldn't see it in the poor lighting in here. Ground off the end and it fits fine now.
Thanks for your helpful information, Mark.

[Mini4Ever]

The actual problem was the extra head stud fouling the impeller.

Never had that problem before. Is the block decked somehow or is the bolt a non-original too long item

[YMJ]

I overdid the stud length!