I want to build up a cossie engine. My mate has a 200 block in his workskop which i can have for a small price or I can use my old 205 block which is alo in the workshop, but this needs to be wire rung which I have been told will be around 400 quid.

What are the pros and cons or wire rung blocks?

Is it better to use a 205 wire rung block as opposed to a normal 200 block?

Will be using 4x4 cossie pistons to get the comp down 7.8:1.