Re: A few things to note about my 69
Love the color - sweet ride!!
I have a 69, sbc/th400, that is just over 4000lbs with me (160). It has AC, power windows, boxed frame, and other add-ons. 3500 seems pretty light.
Are you sure about the 24" tall rear tire? That seems short. A 275-60-15 is about 28". If the wheel is only 24", the 3.42 gears seem like a good choice for the street to me.
Also, if the heads are the AFR eliminator versions, they seem to work better with a little less timing than typical sbc's (34 vs 36) for me.
69 Chevelle Malibu
427 sbc, TH400, 3.55 12-bolt
n/a best: 11.24sec/118mph