I think Bigblock73 & Elgracho are our resident 'weird options' go to guys.
since you say it was a water ski type type option, meaning the beach or lake, I guess the LRP stood for Likely Rust Prone.
For any Nam vets it meant something totally different. being a LeRP, as the LRP's were known, had to be a scary proposition.
DAVE
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"been there, done that, ruined the T-shirt".
2007 LBZ GMC Sierra, ECSB
2006 LM7 RCSB Silverado
98 Vortec project.
94,3500,6.5L 4L80
81 SWB GMC POS finally gone
73 Pinto, stock, w/CragarSS's-eww
LOTS of Cummins trucks.