Don't be overly fazed by the drum brakes on the front,unless you plan on doing multible 150klmh crash stops.The drums will stop the thing just fine once you replace the wheel cylinders,get the linings renewed with a decent compound,machine the drums and get the linings radius ground.
Also pay a bit of attention to the front(make that all)brake hoses,they will have perished and only cost about $12.00 each to get made at most brake places.
As most on here know,i have and do use drums in competition on the B10 models so i'm not talking thru my hat on this issue.
Sure,you can convert the front to disks as many have done,including myself on a circuit car with bags of 1500cc H.P.but there is also a lot of mucking around involved for little gain(in my opinion)going down this track for a road car with up to 1400cc on board.

Good luck and good buying
Cheers