almavor

I have a Herald 13/60 convertible, 1970, and the engine number doesn't seem to be a regular Herald number. It is 602434, no prefix letters. Does anyone have any idea as to what engine this might be?

I overbought the car about14mo this ago and that was how the wheels were fitted. I assumed that the rims wouldn't support tubeless tyres. Only really wondered about pressures after a puncture. Many thanks for advice given, will try running with about 4lb over cross ply pressures and see how handling goes. Alan

Triumph 13/60 fitted with radicals and tubes on original rime. What pressures should I use?