Hi!

I'm in the USA and building a 3door Sierra RS Cosworth clone. I imported a base 3dr shell and grafted the parts to a Merkur XR4Ti donor shell. Lots of work! In the states, these cars are very rare. I managed to find a YB that came with a computer but I have no idea which one I have. The engine was from an early escos rally car (supposedly a big turbo model).







Any help is greatly appreciated.

Here is a picture of the engine. The valve cover is green which tells me it's a sapphire 4x4 catalyst engine but I am not really sure as it could have been swapped due to it's rally background. Is there a way to check based on the numbers on the engine?



Thanks!
-Chad