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02-02-2015, 09:10 PM
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#1 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,739
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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.
__________________
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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02-02-2015, 10:29 PM
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#2 |
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Registered User
Join Date: Nov 2012
Location: crossville TN
Posts: 13
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Re: double hump heads on a 78 engine
461 heads will perform like a vortec head. Looks like the spring pockets have been cut to fit the bigger springs. The springs might be too much for your cam. Are they drilled for 3/8 or 7/16 studs? Do you have the rockers for them? Do they have a home porting job hiding in there? Any cracks? You've got a few questions to ask
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