Pontiac - Race The next Level

          
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  #41  
Old 05-31-2022, 07:06 PM
ponchonlefty ponchonlefty is offline
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Originally Posted by POS Racing View Post
Sorry I got a little behind on this. Dynoed the 350P version 2.0 back in January. It made 584hp/522tq! 10.7 comp on 93 octane.

Got the Ventura finished and to the 1/8mi track over the weekend. Best of [email protected] so far at 3,450lbs through exhaust. Converter is a bit tight and still have s lot of tuning to try. Swapped the PP Crosswind that made the prettiest dyno curve for the Victor that made the highest peak numbers and lost a TENTH! Tuning was limited Sunday as my wife bumped me out of my normal bracket ride so I jumped into competition with the Ventura and went 5 rds🙂

Back to the dual plane and a few other small changes this week then going to Mason Dixon for some 1/4mi fun. Updates soon
thats very cool gives me hope for my project. i wtsh you well.

  #42  
Old 02-10-2026, 06:21 PM
gtonut1 gtonut1 is offline
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Default 74 GTO 350

I have 3 74 GTO's 1 is a probracket car, with a stroked 400, nest is a pure stock automatic car, other is a HB project.
I am rebuilding the stock 350 for my street car.
My question is what is a good cam for the 74 350? Mileage is not a concern, just a good street cam that will put some muscle in it, a good sounding idle wont hurt either.

  #43  
Old 02-10-2026, 07:31 PM
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ponjohn ponjohn is offline
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Quote:
Originally Posted by POS Racing View Post
Sorry I got a little behind on this. Dynoed the 350P version 2.0 back in January. It made 584hp/522tq! 10.7 comp on 93 octane.

Got the Ventura finished and to the 1/8mi track over the weekend. Best of [email protected] so far at 3,450lbs through exhaust. Converter is a bit tight and still have s lot of tuning to try. Swapped the PP Crosswind that made the prettiest dyno curve for the Victor that made the highest peak numbers and lost a TENTH! Tuning was limited Sunday as my wife bumped me out of my normal bracket ride so I jumped into competition with the Ventura and went 5 rds🙂

Back to the dual plane and a few other small changes this week then going to Mason Dixon for some 1/4mi fun. Updates soon
Good power. What RPM peaks?

  #44  
Old 02-11-2026, 07:34 AM
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steve25 steve25 is online now
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The 200 hp 350 GTO motor still came with the 066 cam which was the base line 400 cid cam.

If your sticking with exh manifolds I would run something close to the factory 067 cam but with 1.65 rockers .

Your number 46 heads should already have screw in studs so change them out for aftermarket ones .

In stepping up the Cam I would also mill the heads .045” .

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  #45  
Old 02-13-2026, 10:58 AM
SD455DJ SD455DJ is offline
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Steve, I realize this is minutia, but all '74 350's (both 2-bbl & 4bbl/GTO) came with the 483555 low performance cam ('W' stamp on nose). Same with the 400 2-bbls.

It would have been great of the GTO 4-bbl 350 had the 066 cam.

Dennis
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