The car is a 68 firebird sprint sport coupe, six cylinder four speed four barrel, #'s matching everything. How many of these cars were made and approximately how many are left in existence.

Also, what was the standard diff ratio in these cars?

The Sprints are relatively rare- just how rare depends on what other options it has, and how well documented it is.

Check out my OHC 6 forum (in my signature)

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68 Firebird OHC
Pontiac OHC6 Forum

[This message has been edited by Geoff (edited December 29, 2001).]

The car has a hood tach, no power steering or power brakes, 4 bbl, 4 speed...and i think thats about it for options. One cylinder in the engine is weak (its got 40 pounds compression, the rest are 160.) I'd like to know if that'd either be because of the cam or the valves. Would you also be able to tell me how much horse power a guy could push out one of these little engines without getting too carried away? Thanx.

The cylinder is most likely from a stuck intake valve, or burned valve. I really doubt that it would be the cam- sounds like a good project.

You can easily push 250-270hp in these engines, with the 300 mark attainable. 4bbl cam, good head work, headers with good exhaust, Clifford intake, a good ignition (aftermarket MSD or Crane) and so on. I've made a factory-appearing setup go to 260hp without any headaches.

What do you consider getting carried away?


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68 Firebird OHC
Pontiac OHC6 Forum

I have a friend in my local Firebird club here in WA with a 69 Sprint convertible (I'm sure you know him from your OHC group? Brad) Anyway, he's building his extra 68 Sprint motor into a monster 6! Completely built, cliford intake and headers, AND a supercharger! Now some might consider that getting carried away, But I think it's great!

68OHC is right... you can easily get close to 300 HP with out going overboard! And there are a lot more options out there now for the OHC then there was when I had mine in 83'... wish I still had it!

I say go for it and enjoy it! It's well worth the effort!

Brett - 67 Drop Top 455!

Brett-

I think brad has posted on my forum; he's going the carburetor route with his SC, while I'm going DFI. Ask him if he's posted there...

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68 Firebird OHC
Pontiac OHC6 Forum

Yeah, he has... (Sprint69) He's going with a Holley blow through, the Bonnet, and the super charger... has the intake and headers etc... just fabricating the bracket for the super charger and should have it on the Dyno anytime now... just waiting to hear back!

Gotta love something wild and different!

Brett - 67 Drop Top 455!

[This message has been edited by 1stgenbirdman (edited January 14, 2002).]

Brett-

I'm doing a similar setup; a Procharger P600B, a serpentine setup, and Accel DFI adapted to a Clifford intake. It will also have a Vintage Air kit with the AC compressor mounted below the SC.

Pics are available at www.Fordsix.com (I'm an admin over there).

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68 Firebird OHC
Pontiac OHC6 Forum