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Re: Holley referencing a wide vs narrow frame -help
67'S Weren't available with a big block so the frame has to be narrowed for it to fit .see this thread . 
http://67-72chevytrucks.com/vboard/s...d.php?t=737153
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1967 Factory short bed - Old school
'71 - 350 / 4bolt / 487 heads / Edelbrock C3BX
Muncie M-22 4 speed / Hurst Comp plus
Factory 12 bolt posi 3.73 / 255-70-15
Smoothed firewall / Factory cowl induction
Power disc brakes / power steering / 3.5-5" drop
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