2T-C bore 85 stroke 70
3T-C bore 85 stroke 78
ebay usa maybe?
i can get them thru my engine builder if you need? ill give you a buzz next time I'm down
remove cyl 1 spark plug and put a long screw driver in it, slowly turn the engine over anf watch the screw driver when it comes up and ready to go down. this will a rough guess where tdc is.