[camerjeff]

Originally Posted by Half-Inch Stud

Fastest: 1969 OHC-6 Sprint Firebird: it could Tach at 7500 RPM and cruise at speeds beyond any of the V8s. Try a standing 10 or 20 miles, and see what lives.

a 67 230 OHC-6 Sprint FB yes to around 7000 rpm, I would like to see a stock 250 OHC-6 rev above 6000 rpm. They used weaker valve springs as a built in rev limiter on all the factory 250 engines.

[johnta1]

1968 Ram Air II Firebird with TH400. Was the 4.33:1 rear really necessary to get there?

The Firebirds received 3.90 gears.
(The GTO's got 4.33)

[Sirrotica]

All the LS cars 1,2,3, were governed at 155 MPH.

0-60
GXP with LS3 4.7
GTO with LS2 5.0

1/4 mile
LS2 GTO 13.09
G8 GXP 13.43

[Half-Inch Stud]

Originally Posted by camerjeff

a 67 230 OHC-6 Sprint FB yes to around 7000 rpm, I would like to see a stock 250 OHC-6 rev above 6000 rpm. They used weaker valve springs as a built in rev limiter on all the factory 250 engines.

Ahhhhhhhh not the one I had.