Hey JUICE,
You really need to check your CG, a H-50 should do fine if your boat is trimmed to run properly, cupped is good to remove lift but if it is too high it will slip alot, or too low it will grab too much and not want to get "on the pipe", that engine should be I think 14" from transom measured at the rear or the engine case, CG about even with the spark plug, positive trim angle of the shaft to get good ride attitude witout blowing over. ;D