Car Weight Question 63-69

My 68 Cuda fastback: 360 (iron heads, aluminum intake, and headers), 727, 8-3/4. Full stock interior buckets and console car with a mild stereo system added and extra insulation under the carpet, all of which might add 30 lbs. max. 275/60/15 tires out back and 215/65/15 tires up front add some weight I'm sure. I weighed it and it weighed 3460 lbs. with a full tank of gas. Oh yeah, it's got dual exhaust all the way out, subframe connectors and a driveshaft loop. That probably adds a little weight too. Maybe another 30 lbs. My guess is it probably weighed about 3350-3370 when it rolled off the showroom floor.