by wlarson861 » Sat Apr 08, 2017 12:51 am
some of the vw conversions used a magneto that used the distributor drive on the top front of the engine. Great Plains had such an option for their conversions. I suspect the top blister is to accommodate that conversion with a magneto up front
Bill Larson
N861SX
Sonex, polished, tail wheel, Generation 4 Jabiru 3300