This would be really bad for the IP as the elements are lubricated by fuel. As such you'd basically be starving it of lubrication everytime you shut it off.

If your looking for something really simple maybe go for something like the old front end loaders used. You would lift up on the accelerator with your toe, which would pull instead of push on the linkage and it would pull the IP into the off position. I think it was actually called a deaccelerator.

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold