do you know if running in engine with not so good spark plugs would be damaging. only gonna do a 1000 miles with them. gonna wait till after when setting up to throw some denso plugs in.. anyone rate them too?

 

What do you class as not so good? Good condition cheap plugs will be ok as long as you don't use much boost.

But when you can buy a set of 071C plugs from Ford for cheap money that can handle a bit of stick, is it worth the risk?