Use a short cam, something like this...
http://www.cranecams.com/?show=brows...tType=camshaft
Or a Comp XE250H...
http://www.compcams.com/Technical/Cu...ML/128-169.asp
Or a 201256 Isky...
http://www.iskycams.com/onlinecatalog.html
Or an Elgin 262/268...
http://www.elgincams.com/
Or a Schneider 21000...
http://www.schneidercams.com/cams/21.htm

You get the general idea....don't let anyone talk you into more cam than I've suggested here, you won't like it based on what you said you wanted to do with the motor.