Without reading everything above, I have a 3T-G, and I think I have the same Wade cams also. But mine is running on 40mm Solex carbies.
I just used a 3T block, bored to 86mm. New 3T-C pistons, 1mm over, with the exhaust valve relief machined to copy a 2T-G piston. Big cams, same as yours. Stock 3T-C rods and crank. Lightened flywheel, was a stock 2T or something machined back to about 6kg.
You can use the stock 2T-G cam sprockets. They work very well, and have about 4 or 5 different positions on them standard. You can drill more holes if you can't adjust it to what you want for some reason.
Dial in the cams! Don't go by the factory markings. You can change the lobe center angles between 100-110 degrees depending on where you want the power.