Compression Question for a JLO 440

[kat266]

What is the proper compression range on a JLO 440 ? Mine has 215lbs PTO and 180lbs clutch while cold. Is this too much difference between the cylinders ? I'm not sure if it has been rebuilt by a previous owner. Is this a problem starting to show up now ? I am looking into changing the cylinders and heads to the 5 port, 6 bolt heads for better performance. Don't want to waste my time if there is problem.

Thanks
Keith