I've been peacing things together for a small block Chevy build-up for some time now. I've gotten really interested in the ratio rockers as a quick cheap troque booster. I was wondering if anybody on here could help me find Ratio Rockers for the 420A. Oh... I was checking out Ebay and found a 57 mm Holley throttle body, is that worth looking into? Thanks for the help.

Ratio rockers are not a type of rocker. Every V8 Rocker is going to be rated at a specific ratio. Ratio is determined by the length of the rocker where the pushrod seats. The closer the pushrod seat is to the fulcrum point, the greater the valve lift will be.

You will not find any different ratio rockers for a OVHC motor since the lifter location cannot be moved and therefor the ratio cannot be altered by design of the rocker.

The 57MM holley TB is a stock TB to the v6 intrepid. people selling them on ebay are ripping people off. Holley never made an aftermarket TB for our cars. The 57MM was the factory TB for the intrepid. Kinda like how Carter or Rochester made the Carb's for GM and ford during the 80's.

Ok. Thanks. I have all the bolt-ons, anything else I can do to help the engine free-up more power? Maybe a Supercharger?

if your asking about a SB Chevy then your at the wrong forum. Chevy is gay go with a Mopar.

Originally posted by Star Turbo Talon
Chevy is gay go with a Ford.

Fixed. End of story.

Originally posted by djtrickee

Originally posted by Star Turbo Talon Chevy is gay go with a mopar.

Fixed. End of story.

refixed. that is all

Ive just read a article the other day pertaining to ratio rockers, Crane had just introduced a new line of rockers for the v8 lineups, but as far as the 420a goes i dont think you will ever see anything along those lines for this platform