I have a 283 sm block chevy motor mark on front of head is rectangle with triangle on top,need 2know yr.?

Question:
of block, rear numbers on block are 3849852 on front of block under alternator x5050. I'm told it's between 64-67 but i'd like to know specifically what year and how many horse power this block is factory 2barrell carb. any responses would be greatly appreciated.

Answers:

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Look on the passenger side there is a pad (flat spot) in front of the head . Should have some # and then 2 or 3 letters. If I knew the letters I could tell ya what ya got. In 1957 the bolt pattern was staggered on the valve covers and an only certain valve covers will fit. 2 humps on the front of the head can either be 1.94 valves or 2.02 valves with a cumbustion chamber between 68 and 72 cc

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I had a couple of them. If I remember right the 2 barrel was 195 horse and in 1967 they only had a 307 ci. There wer 2 or 3 letters on the front of the block along with the serial number that depicted the engine type. The mark on the head is likely a molding identification mark.

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think 64 is the year 67 were 327c.i. go to Chevrolet .com look under classic that will tell you the h.p.

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this mark represents "power pack" heads. They were the better heads at that time.

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These heads go back as far as '57. I had these on my '57 Chev. They are between stock and the fuelie heads

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Stock lo-po heads had just the rectangle

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Power pack heads had your triangle

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FI heads had two bumps (camel humps)

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http://www.mortec.com/castnum.htm...

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I don't know about H/P on those.
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