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#1
10-10-2022, 06:49 PM
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1968-72 GTO vs. 1970-81 Pontiac round port headers
greetings...would like to get opinions on ROUND PORT header fitment.
for 40 years I've been under the impression, headers that fit 1968-72 GTO, also fit 1970-81 Firebird. but that was D-port headers. I'd like to put RA IV heads on my 70 GTO 455 engine. My question is the same as above statment: does a 1970 Firebird round port header, also fit a 1970 GTO ? because...lately I'm seeing different part numbers for GTO and Firebird, same year 1970. what's up with that ? these headers are PRICEY now, even used, so I don't want to buy a header, only to find out it doesn't fit. all opinions welcome, thanks. |
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#2
10-11-2022, 11:05 AM
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Different rounds port headers for A body and F body for sure. I had a Hedman set of 1 3/4 that were supposed to fit early A bodies and second gens-both sides rear tubes hit my TAs firewall!
70 TA I know Hooker 4202s will fit good. Some will need "clearancing" around the oil filter or lower A Arm pickup.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#3
10-15-2022, 09:10 AM
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I have an A-body 70 GTO, thinking of running RA4 heads, and there seems to be quite a few pair of used Firebird 70-81 round port headers around for sale. I was going to try the 70-81 Firebird headers on the 70 GTO specifically, not the other way around. any idea if that would work ?
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#4
10-15-2022, 06:26 PM
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No idea but the cheaper stainless OBX GTO round ports do not fit a second gen. Might be able to fit changing a couple of tubes. If the OBX are still around they might fit.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#5
10-17-2022, 07:55 AM
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what does OBX stand for ?
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#6
10-17-2022, 12:44 PM
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That is the brand. They were cheap 2-300 stainless steel round port headers for 68-72 A bodies. Used to be on Ebay all the time.
http://www.obxracingsports.com/products.php?pk=1838
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#7
10-17-2022, 12:46 PM
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__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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