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Re: fastburn heads
I believe the P/N is 12464298; if this is the case, then these a screamin' deal on some great heads for a mondo 350 or strong 383/400! "Fast Burn" has been applied to a bunch of different castings, however...
From the GMPP 2008 catalog:
When it comes time to own the street, this is the head for you!
GM Performance Parts has brought together all of our new
technologies to create the ultimate 23˚ small-block GM cylinder
head. Fast Burn technology maximizes combustion of the air/
fuel mixture, resulting in higher cylinder pressures and more
power production. The combustion chamber (62cc) is designed
for flat top pistons, and the head requires no additional porting for
optimum performance, so it provides maximum “out-of-the-box”
performance. Recommended for any standard coolant flow 1955–
2000 283–400 cubic inch small-block, the Fast Burn head helps
us make 425 horsepower from our own ZZ383 crate engine!
• CNC-machined aluminum performance head
• Completely assembled with 2.00"/1.55" valves
• 210cc intake port, roof raised .240"
• 78cc D-shaped exhaust ports, raised .200", requires
Fel-ProŽ gasket #1470 (may require minor trimming)
• 62cc combustion chamber, .400" thick deck (can be
milled safely .060")
• No heat riser
• Angled spark plugs (5/8" hex, 3/4" reach, tapered plugs)
• 1.48" Valve spring seat diameter
• Use head gaskets with stainless steel fire rings
• Raised, machined rocker rails
• 0.530" max valve lift (without modifications)
• Screw-in studs, (3/8" top, 7/16" bottom)
• Dual bolt patterns for perimeter bolt and center-bolt
valve covers
• Dual bolt patterns for both Vortec and early model
intake manifolds
• Use production intake gasket P/N 12529094 for Vortec
intakes or dual bolt pattern intake gasket P/N 12497760
for either early model or Vortec design manifolds
(Fel-ProŽ #1289 and #1207 may be used)
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