I have an old team orion engine I never figured out exactly which type it is. It is however a 3 port ABI one.

The conrod broke last time i drove it and I am looking to replace it hopefully with a cheaper brand then orion conrods, does anyone know if a different brand conrod would fit this engine? or what engine it is?

seems to be about 29mm from hole to hole but its hard to measure since it broke!