Options:
65-75 Hp VW ~$8K
80 Hp 2200cc Jabiru ~$16k
120 Hp 33000vv Jabiru ~$20K
A couple have put in a 100-120 Hp Corvair Auto Conversion ~$9 – 12K
Right now we are leaning to the VW level.
We purchased a Revmaster 2300 engine.
Building An Airplane From Plans