350 L48 Power Plant ?

[IZRSSS]

The L48 350 small block first appeared in 1967 and was rated at 295hp. In 1969, the power out put changed to 300hp & 380 ft lbs of torque.  Can someone explain what GM did to increase the out put. Was it simply changing to a Hyd Cam, a 4bbl Quadrajet, a 4 Bolt Main & Cust Pistons or is there more to this story?

Thanks

[jdv69z]

I didn't think there was any difference. Chevy just changed the rating. 295 HP was an insurance rating thing. Sort of like the 302/290 HP rating. Not sure though.

Jimmy V.

[JohnZ]

Can someone explain what GM did to increase the out put.

In those days, published power ratings were determined more by Marketing and internal GM politics than anything else; searching for any logic in how they were rated is an exercise in futility. :-)

[IZRSSS]

Thanks John & Jimmy...I'll stick a fork in it  .