Does any one know what ratio of roller rockers these are as have no markings

They are on a handbuilt tickford 5.0ltr

Also is there any way of telling the 200kw and 220kw tickford engines apart from throttle body and egr plate???

Cheers

you could contact Yella Terra and quote the part no .....or get some verniers and measure the distance from each pivot point to the centre of the shaft and calculate

The yella terras with no mark are generally 1.7:1. the 1.6's have a 6 inside the little circle.