Re: double hump heads on a 78 engine
Good advice above. You said your engine was a 78 but not what vehicle it's in. If it's a 69 or newer with a long water pump and passenger side alternator, you are asking for lots of other problems.
Once again, if your vehicle uses a long water pump, you would be better off buying brand new Vortec heads and intake IMO.
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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