[Keithc8]

I would think that a y engine of any kinf would be balanced and blue printed. This is just part of the standard procedure with us. When you use CNC machines and measure all of the components right you will have a blue printed engine. I would never put an engine together with out balancing it unless every part came with the engine originaly.
We balance every engine as well as check every tolarance. Our state of the art machines help us do this at a reasonable price, just have to spend about a million to get there. It just cracks me up how people will try to save 500.00 to 1000.00 when doing an engine and it would have been much easier and less expensive in the long run to do it right with someone that knows what they are doing.
Parts do break and when you race engines you will find what part is the weak link. You just have to build the engine with the right parts for the application. Do not lie to your builder or think that you can get by with cheap stuff in a high performance engine. Do not cry to anyone if you use second rate parts and machine work when it does come apart.
Had a conversation with one of my customer today that is a plumber. He gets the same amount an hour that I do but complains about what this engine stuff cost. I have about 1.5 million more invested than he does, but I guess that makes me the dumb ass and him the smart one. As I have said before you have to love this stuff to be in the engine business and like to work many hours to make it.
We also supply a parts, bobweight, balance, head assembly, engine assembly and dyno sheets with each engine. More paper work than you get with about anything else like this. Then it kills me how many people lose it or have someone interested in their engine and they call us for the paper work.
All in all I think most people have pretty good luck with the engines in their Cobra's.

Good luck, Keith