My personal opinion is these units are not the best for performance. Originally WICO built these for stationary use where an engine could be self sufficient on the piece of equipment it was mounted on where the engine could be hand cranked without the need for a battery to supply the ignition. All of the WICO units made that I have seen that mounted in the head did not have any type of advance built in. This was because the engine was generally operated at a fixed speed. In a low compression head application and used on the street, it would likely not be a big deal however with higher compression comes the need to be able to adjust the timing. Also remember that at lower RPMs, a magneto puts out less energy so you will not have as strong of an ignition spark at the lower RPMs. Personally, I would suggest if your friend is seeking performance over looks, I would steer away from the mag and use a good distributor. Just my opinion though.
