Great hitch - thanks for the link.  Mine has a fixed hitch with a solid tongue and hole for ball.  I'll be switching it to a 2" receiver to carry bike racks and a platform hitch and that may be just the ticket.  On the theory the rear frame height above ground and our sewer pipe carriers may be oriented similarly - got a picture or 5 so I can see if that will allow me to keep the tongue for days I want to tow something?  Thanks.

it won't strain the suspension or axle. depends on what maker used to extend the truck frame.  as long as it is beefy enough to support the weight

Sorry, I didn't mean towing capacity.  I meant capacity for the cargo rack/carrier (tongue weight?).  How long have you been running with that hitch?  I would like that but am concerned for safety and longevity.  I heard that the weigh wouldn't put too much strain on the rear axle/suspension.