I need a hall effect sender for a new speedometer I am getting. Would any of these suit a 1971 Beetle?

http://www.ebay.com/sch/i.html?_nkw=hall+effect+autometer&_sacat=0&_o...

I run one of the autometer senders with a autometer speedo, a bit more information is required to match the speedo to the sender, what is the speedo. also you have to apapt the sender to the cable, i machined a nylon one for mine. there is one available on line already mated to a beetle speedo cable from one of the sellers on ebay.

If you don't mind a small amount of fabbing, its not hard to make one up.

I fitted a hall effect sensor on my rear axle to operate my digital speedo and my Engine management needed a speed signal.

It was just a $25 proximity sensor off ebay and some scrap metal I had lying around.

Off the rear axle works better too as on a dyno the front wheels aren't turning.