ACMESPEED

I'm buying a big block Chevrolet engine with the following components, and I have my own (original) heads, but was curious anyway about the statement that these are the HOT 207 heads....??

Anyone ever hear about 207 big block heads and are there any details about their performance ?

The engine is going in my 73 Big Block Vette...

Engine Details:
CHEVY 454 CI, 455 HP 2 BOLT MAIN
Midnight BIG BLOCK CRATE ENGINE
GREAT MID to HOT!! STREET - 207 HEADS !!
Torque range: 492 to 525 ft/lbs of torque
<< This One is A Real Torquer >>
HIGH PERFORMANCE, Dyno Tested With
YOU IN MIND for the street!
THIS ENGINE WAS BUILT FROM ONE OF OUR DYNO PACKAGES

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Engine Will Run on unleaded fuel 91+
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DOME PISTONS 9.5 + SEAL POWER HYPEREUTECTIC
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Cam is BIG 550 + Hydraulic Dual Patterned High performance
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2800 + Stall Speed Convertor Required
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This One is A Real Thumper
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GREAT OLD SCHOOL SOUND
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Heavy Duty Roller Timing chain high per
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PER Screw In Studs, Guide plates
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SSB Roller Rockers, SSB Molly Push Rods
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STEEL FORGED RODS, NODULAR CRANK
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NEW Dual Plane High Rise Intake Manifold
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New Harmonic Balancer, Flex plate
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Chrome valve covers or call colors painted
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Chrome or Painted Timing chain cover, 5 qt oil pan

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Power 4® cam kit Speed Pro 530-550
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Power 4® Speed Pro hydraulic lifters
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Power 4® spring set, heavy duty (1010 series sets)
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Dual plane High rise intake manifold
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One-piece stainless steel intake valves 207
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One-piece stainless steel exhaust valves 1.7
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Premium positive valve seals,polyacrylate
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Heavy duty,hp roller timing chain
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Controlled internal oil system (a PER exclusive!)
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Heavy duty, high volume oil pump Melling
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Heavy duty steel collar oil shaft
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Heavy duty oil pickup screen
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High quality Speed Pro Dome hypereutectic pistons
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PER® HP plasma moly rings Speed Pro
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Brass freeze plug kit,gallery plugs kit
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High quality rear main seal double lip polyacrylate
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Fle Pro PermaTorque heavy duty gaskets and gasket set
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Clevite 77 Main bearings,Real Tri metal, high quality
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Clevite 77 Rod bearings, Real Tri metal, high quality
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New rod nuts ARPs installed
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Cam bearings, high quality 360 Set

POWER 4® ENGINE MACHINE LABOR includes:
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PER 4-angle® valve job
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Mill-matching suface heads
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Heavy duty thick wall valve guides
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Valve guides custom cut for posi-seals
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Jet vat block and magnifluxing
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Remove and replace all freeze plugs
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Remove and replace gallery plugs
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Remove and replace cam bearings
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Custom centerline boring of block
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True 90 degree V8 centerline boring
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Power hone to fit pistons and rings
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Custom crank Micro polish radius oil holes
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Rods pressed off, then heat fitted
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A R P Rods Bolts Install
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Rods checked for alignment
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Street Race balancing


Thanks for any feedback on the 207 heads....

Mike

427Hotrod

Not sure...there are 702's and 206's.....

Looking at the parts list I wonder if they are trying to refer to valve size? Normally a 2.06" intake. I see the same thing written beside the intake valve size and then they say 1.7 beside exhaust valves.

Not sure what you're planning for this engine...but it appears to be a stock rebuild with hypereutectic pistons, stock rods, cast crank etc etc. I would really verify mfg names because other than the bearings and ARP rod bolts...all that house brand stuff scares me as being the cheapest of the cheapest.

You might look into VortecPro in Co. Springs. He builds some real nice packages for good prices with good parts and is very picky about machine work quality.

JIM

63mako

Stock type rebuild. Pressed pin pistons. hyper pistons, not square decked, No torque plate hone. NO name internals. 2800 convertor required in a 9.5 to 1 comp engine? I would be very wary of this engine.

63mako

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