gear ratio

First Forum site i ever joined so this is all new to me. Patience is appreciated :) I have a 67 Galaxie 500 fastback with a 429 & C-6 originally a 289 car. I'm wanting to change the gear ratio right now im pretty sure it is a 2.75. Thinking of going to either a 355 or 380. Once in awhile...

Hello to all, first ever post! Picked up a 70 torino w/351c-4v from my brother-in-law. It's my mid-life crisis! Car has radical cam, 2500 stall converter and c4 automatic. Original rear-end has 3.00, brother-in-law says I need 4.11s in back to really enjoy the engine. He says it needs to...