351w with exhaust manifolds in 73 4 speed car

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jomar1957

Active member
Joined
Mar 16, 2014
Messages
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Location
rochester ny
My Car
73 302 4speed deluxe int air
I have a 73 302  4 speed that I would like to change to a 351w but keep the stock duel exhaust with manifolds. Anybody do this? if so  what h- pipe? And what else would I need? 

 

Hemikiller

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Jul 12, 2010
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Location
Killingworth, CT
My Car
71 Mach 1
65 coupe
You can bolt the 302 manifolds to the 351W heads. The 9.5 deck height of the 351W, vs the 8.2 of the 302 will move your pipes out 1" on each side, as well as up one inch. Check for clearance, especially on the driver's side by the steering box and around the clutch linkage. If you have room, you might be able to use the existing H-pipe by cutting the crossover and welding/clamping in a section of pipe. 

 

EdM

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Jun 5, 2014
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Location
Between the Texas Hill Country and North Idaho
My Car
1973 Mach 1 Q code, a 427 Dart based Windsor, Pro Flo 4, Tremec 5 speed, A/C, 12.7:1 steering conversion, SoT coil over and Dakota Digital dash.
I have coated JBA short tubes in my 73 Mach 1 with 9.5" deck 427 Dart Windsor that will be available early October when I return home. I have 1300 miles on them with factory z-bar, PS and PB.

 
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