What lowered springs?

[firstgencamaros]

Hoping some of you may have been in the same spot before. I have a 69 short wide that I want to sit lower than stock. 2"-3" would be fine as function is important. I want it to be a static drop with the truck level or maybe raked with the truck no more than 1" higher in the rear. I am going to tow a car trailer with it and will add air bags to it for towing assist only. The truck has a cast iron head big block chevy engine with th400 trans. I do not want to notch the rear frame. Any suggestions as to what springs to purchase would be great.

Thanks for any input.