I'm running a PS62/65/14 with Juice and DDP 110 sticks. Tows like a dream but a tad slow on spool. I'd really like to try out a 12cm housing or a 71/14 combo to see what the differences are. The one I have cools great, but bobtail, it is a touch slow and a tad smokey. I'd love a tad more air to get rid of the haze at cruising but I don't want to lose too much up top. Dyno's at 450/972.
To answer your original ? "how would the 62/71/13 work", don't know first hand, but sounds pretty good to me. If you get it and don't like it...I'd like to try it for a week.