yeah I think we're talking about the same thing. The L series gear is taller as it were so the pump housing needs to be taller to hold the new gears. Souds pretty simple, I don't have a lathe... so that will be interesting but i understand what to do.
We have a website here where you can send in cad drawings and they make the part and send it back, not too expensive for something like this... I think i'll have to try it.

Thanks for the info!

Is there any demand for the spacer to do this conversion? I could get some made to sell.

Better yet, are there any hi volume pups for the a15 already made?