Got a 1992 valver with a Williams engine in, checked tell tail signs like blue dot on dipstick, bigger oil cooler, also checked under inlet to see what looked like f7r sat in front right of the block but when im driving it it pulls from low revs but thru revs don't limit at 6400k which is what a Williams should, it goes to 7500k??? Any ideas?? Could it be running on a valver ecu??[/code]