hi i want to fit an external oil pump to an 850 reliant engine as im fitting an alloy sumpso need to do away with the internal oil pump but was wondering if their was an external one to use also the sump only has one outlet so was also hoping for some advice on this and real pushing it any tuning tips please would be gratefully received thanks

Have a search on the 750 forum for DARVI (Dick Harvey) dry sump engines.
He fitted dry sump pumps onto modified timing case covers.

Darvi dry sump pump

chears
al

I was about to say that this is what you want:

http://www.amazon.co.uk/750-Racer-Everything-Building-Sports-racing/dp/1852604476

... then I saw the price!

U2U me with your e-mail address and I'll scan you the chapter on tuning and dry sumping the Reliant engine from my copy.

Or as Minitici says, try the 750 forum or a wanted ad on the 750 club website; the formula has largely gone over to Fiat engines now, so there are probably quite a few tuned Reliant engines kicking about in sheds.