Hey MattsGrandMarquis, if you want some good ideas on where to go and what might be involved in getting a carb on that 351, there's a good thread here http://www.grandmarq.net/vb/showthread.php?t=33429 about my ideas for putting a 4-barrel on my variable venturi-topped 351, which is probably what your engine started life as. There are a few guys in that thread who have personally done the swap weighing in.
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1983 Mercury Grand Marquis Hesitates on Acceleration
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85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc
06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)
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