So, to put this into perspective: For my 20 HP V-twin Intek, using the ARC rod #6281 (.050) longer than stock, and using this piston, 699025, which is .050 shorter than stock will provide more compression. Is this correct?
NONONO. The 6281 is for 25 or 28 series single cylinder engines. ARC does not make an extended rod for the intek motor. Go to their website
www.arcracing.com and look at the part numbers.