hello all
i need some help with my 1600 x-flow engine i recently brought a kit car that is basically a mk2 escort underneath. it has come the time to fire the engine up but the question is has the engine been converted to unleaded if so how could i tell, is this even possable with out removing the valves. and also if removing the valves is the only what damage would be done if any bye useing unleaded with lead replacement.

any help would be great.