Small Block Chevy Vortec Cylinder Heads
New SBC Cast Iron Vortec Head Performance
ProMaxx Performance Small Block Chevy Vortec 185cc Cylinder Heads feature an all-new cast iron casting. Perfect for Street, Strip, or Oval Track Applications, these heads are machined with large diameter spring pockets to handle higher lifts than stock while being drilled for both Vortec and carbureted intake patterns.
Assembled cylinder heads use 2.020 in. intake/1.600 in. exhaust valves, valve springs with .575 in. max lift for hydraulic flat tappet camshafts or .500 in. max lift for hydraulic roller camshafts, 3/8 in. screw-in studs, and guide plates.
Since these heads come with guide plates do you need to use self aligning rocker arms? Or you could you use regular rockers and take the guide plates off? I have been told to run one or the other but never both
If running a vortec intake do you need to plug the center holes for oil seepage??
Will p/n 2151 work with Edelbrock Performer intake manifold for pre-'86 SBC? Or would it be better to buy a new Performer manifold for Vortec heads? What p/n springs can you recommend for hyd roller cams? Thank you.
I tried using a 1205 gasket and a team g intake the intake and gaskets don't cover the top of the intake runner there is a 1/6"gap at the top of the runner but a vortec intake covers the runner
What plugs should be used? Can Bosch 4458 be used? If not what bosch platinum plus 4 plugs should be used?
If I change the springs can I run hydraulic roller?
Do these heads have the GM part #’s on them, or are they copies of the Vortec heads?
Do you need to run self aligning rocker arms?
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