1983 Chevy Blazer

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Engine Performance problem
1983 Chevy Blazer V8 Four Wheel Drive Automatic 140000 miles

We have expanded our Freedom Series heads to include our newest 225cc runner. To achieve the best flowing cylinder heads we perform our 2.08"/1.60" 5 angle valve job, hand blend the valve bowl area, and mill to exact tolerences. To this we add only the highest quality EV8 2.08"/1.60" stainless valves, .575" lift (hyd. flat tappet) springs, steel retainers, 3/8" studs, bronze guides, and guideplates. These heads are a great addition to engine builds that are 383 and larger.

*Sold as Pair.

**Call for Spring Upgrades.

Technical Specs:

Combustion Chamber: 64cc
Intake Runner: 225cc
Exhaust Runner: 62cc
Intake Valve: 2.08"
Exhaust Valve: 1.60"
Max. Valve Spring Lift: 0.575"
Spring Pressure Closed: 115 lbs. @ 1.800"
Spring Pressure Open: 310 lbs. @ 1.225"
Retainer Material: Steel Valve
Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle
My engine is a 1978 model 400 c.i., bored .030 to 406 c.i... 10.0 -1 flat top forged pistons... My question is are this applicable to my engine and what modifications are their if I use them? What pushrod size? What intake, carburator, timing, rocker arms, or any other advice would be helpful?



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Tuesday, October 28th, 2008 AT 5:50 PM

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