pedal cars

I see where people making pedal cars bend the crank from solid. Now if you get two sets of  bicycle cranks and set them up on a single piece of solid rod and grind where the cotter pins go, then the pedal can be set up. Drilling out the threads and sliding threw a suitable rod and weld this in place putting in the pedal tread before welding. when the whole thing is together cut the main axil to make the crankshaft,Just like a car crankshaft but not as heavy. The big ends are where the pedal treads go. There can be three main bearings but I think two would be enough. This should run true to a couple of thou. I will make one and show pictures as time permits. If you have trouble post a comment and I will get back to you.