Freestyle 155 OEM Pump set ups

OK, so, admittedly, I am not up on my aftermarket hulls and pumps other than the normal skat mag/solas mags. Is there a cheap alternative? I thought I had read somewhere that people where putting 155 OEM GP pumps in hulls? Or was I dreaming? What is doable?

SM
 
I have questions to fit TBM cone into 155mm pump. Do I need to modify pump or cone ?
I'm planning to run dasa +8mm 872cc (with all goodies MSD TL, powerfactor pipe....), anyone should give me a good starting point to choose the pitch of the impeller ?
 

D-Roc

I forgot!
You will need to modify both the tbm and the casting around the hub of the pump. With your motor I would try a 10/16 skat swirl e-75. The exit nozzle diameter and tail cone size will need to be set at the water.
 
Now I have 155mm setback 12 vane pump in stock.

I also can make 160mm pump
 

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