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01-12-2022, 05:32 PM
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#18 |
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Senior Member
Join Date: Feb 2002
Location: Southeast Michigan
Posts: 909
Likes: 70
Liked 239 Times in 114 Posts
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Re: Pontiac 455 hp reduction
Back in the early 80's we ran a 73 GTO in Stock with an NHRA factored Hp at 350 non ram air and 355 with ram air . There was some confusion on the factory HP rating which originally came out at 310 , but was later reduced to 290 . Pretty hard combo to run because the parts are so rare .
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