I've had some success with a Golden Bee running an RJL head and a DDD heavy duty crank. I do use a Sure Start style snap starter with it. Makes a nice sport engine with a 7x3 or 7x4 wooden prop. I've also bench run this set up with a 6x6 Graupner, a combination that would surely be way too fast for me in the air and probably break con rods on a regular basis.

There's a great thread in the 1/2A forum that in part discusses this conversion: [link=http://www.rcuniverse.com/forum/m_4085390/anchors_4085390/mpage_1/key_Cox%252C049%252CTexaco/anchor/tm.htm#4085390]RJL on a reedie[/link]