My interpretation is that you will only need the integration system to back-feed the house. I don't believe it will be necessary if all you plan to do is charge the truck.
Current text of the proposed bill for reference:
"
(e) MANUFACTURER’S SUGGESTED RETAIL PRICE LIMITATION.—
(1) IN GENERAL.—No credit shall be allowed under subsection (a) for a vehicle with a manufacturer’s suggested retail price in excess of the applicable limitation.
(2)...