I have been told that twin port heads won't fit onto a single port 1200. I have a knackered 1200 and a set of good twin port heads. I have measured everything and can't see why they won't fit. Can someone explain why please.
1300 TP heads will physically fit onto 1200s. 1600s won't.
The top row centre pair of barrel studs will be too long so use 1300 TP ones.
You might have fun fitting an exhaust too - if you do - a little cutting and shutting of a 1200 4into1 will sort this.
Use a 1300 inlet manifold and carb. because a 1200 block is not as wide as a 13/15/16 you can lose width from the manifold by trimming the ends of the centre section where the boots clamp onto. Don't try trimming the end castings.
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