Thread: cast iron intake

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Did Chevy ever build a performance 4bbl intake for the big block made of cast iron? I have a project to build that requires all cast iron blk, heads, and intake. If they built one, was it a spread bore or square? Be nice if it's a square bore. Appreciate any help I can get.

Perry Hanlin
40 years of tractor pulling
home of the "Circle H Tractorworks"

Originally Posted by hpwdboss1

Did Chevy ever build a performance 4bbl intake for the big block made of cast iron? I have a project to build that requires all cast iron blk, heads, and intake. If they built one, was it a spread bore or square? Be nice if it's a square bore. Appreciate any help I can get.

Perry Hanlin
40 years of tractor pulling
home of the "Circle H Tractorworks"

yes for BIG O port heades they were made for the holley and theQ jets spread bore they were used on all the older 396 -427 around 65 to 69

Pat...Thanks for the repy. You state " the big O" I'm assuming oval port? Are there different size oval port intakes? I have a set of oval port heads we intended to use if possible, so your info works from that standpoint. Never really messed with stock iron, so this is all new to me. Thanks again.
Perry Hanlin

Originally Posted by hpwdboss1

Pat...Thanks for the repy. You state " the big O" I'm assuming oval port? Are there different size oval port intakes? I have a set of oval port heads we intended to use if possible, so your info works from that standpoint. Never really messed with stock iron, so this is all new to me. Thanks again.
Perry Hanlin

yes the older bbc block heads 781 049 and other have a bigger port the older iron intake was hi rise dual plane big port there was a time you could not give them a way are so heavy

My 1965 Impala 396 intake has the word Holly cast into it.

Originally Posted by hpwdboss1

Did Chevy ever build a performance 4bbl intake for the big block made of cast iron? I have a project to build that requires all cast iron blk, heads, and intake. If they built one, was it a spread bore or square? Be nice if it's a square bore. Appreciate any help I can get.

Perry Hanlin
40 years of tractor pulling
home of the "Circle H Tractorworks"

I actually have one sitting in my basement. Took it off my vette 25+years ago-and the front end lifted up an inch!!!

It's a hi-rise Q-jet set up-oval port. The casting number looks to be 6833948.

Richard