Rochester Quadrajet's

Rochester Quadrajet Speadbore

Myth #18

The 1970 Buick GS 455 'Stage 1" utilized the 'rare' 800 CFM Spreadbore.

False.

The 1970 Buick GS 455 'Stage 1' utilized the standard 750 CFM Spreadbore
{Part #7040246}

But, the Carburetor was re-calibrated with;
* Main Jets .............. .068"
* Primary Rods ......... .042"
* Secondary Rod ....... 'AU' {.0530"}
* Mixture .................. Moderately Rich
* Rod Length ............ Long
* Fuel Inlet ............... .135"