mine also was in open barn for a few years , cleaning is very good -every thing you clean gives you 1 hp


the leads are high performance ones so maybe it makes up for it. 8mm.
the spark plugs are performance ones too, i have to admit there was a differnce in livlynes of car.
Cleaned the carb and the throat (havent taken it apart yet as it works

ive put a fuel addive in to clean the valves up a bit etc
i will probally change the engine to a 1.8i 8v or 2.0i 8v soon mainly for fuel econemy+ power.
Main points: wash+keepclean keep the servicing good drive nicely and it will last for ever. .....maybe

Cheers
will