Updating my '69 Camaro

[Vegas69]

You're going to need around 2.25-2.5" of bump. That would've been the benefit of raising the shock mount, more bump travel at a lower ride height. However, your pinion housing will hit the tunnel before the pumpkin hits the trunk. My car is 24.75 to the crease on the quarter. I can lower mine to around 24.5 but I'd rather have a little extra to play with on the race track. 24.75 gives me 2.5 inches of bump travel and the pinion is about a pinky away from the tunnel at full compression. I'd start at 2" of shock travel and keep an eye on the o rings.