i had an old triumph 2000 which i fitted a GT6 engine to. The triumph had done 220,000 miles and the engine was a little loose! GT6 had mated with a bus leaving only the engine. i changed the crank for the 2500 one, and had every thing in the engine balanced, weighed all the pistons and con rod on a micron scale and made them all the same. it would do near 7500 rpm. it was a very nice car to drive, great gearbox with the mad overdrive on the gear knob!! i think my car was a pretty drab maroon colour no metallic paint in them days.