Does the stock fit you well? If it does you do not need to change the tangs. Tangs get bent when the stock needs to be a great deal higher at the comb. If you just raise the comb height and do not change the tangs you end up with what looks like a birds head. Too sharp a angle to have a pleasing profile.
Long trigger guards look nice but are not manditory. The nicer the gun the more likely that you will want to change the trigger guard. If your project gun is a low grade you may decide just to keep the old one and bend it into a straight line if it is bent now. You could have a extension welded on and shape it by hand in a day to a perfect long trigger guard. Rust blue a small part is very easy to do.
I would advoid the swan belly effect that I often see on straight stocks. Happens sometimes when a stock is bent to decrease total drop at heal. Looks like Dick Nixon's nose in profile. Some guns have this shape stock by design. I like nearly flat lines on my straight stocks. Makes the stock seem to flow into the gun like a fluid motion. Very graceful.
