single port case oiling upgrade/power tweek

whats the best way to insure no starvation on a single port(1300) it has bigger oil pump and remote cooler taken from og cooler ports,apart from blending the pump/case port I cant think of anything else.checking the race motor over as was loosing et last year,we cant afford a new case ect for the 1903 motor that blew so need to hop up the 1679 cheeply.its got to be relieable,revlimit 6kmax(has balanced bottom end)have a 120 cam,cant remember whats in now!!!,think ing ratio rockers?will be porting heads/cleanup and port match but not to mad as stuck with36 idfs.on a good day has run 14.8 now 15.6 and getting slower ,was thinking cam wear?as every thing else ok but then valve clearances not altered.or if some one would donate a stroked 1776 (90.5 bore)race short block that we can fit our heads ect to(dream on )