how to raise front end of car?

I have a 67 barracuda and when I bought it it had a 318 in it, and set fine in the front...the guy that fixed my car for me (I was 16 and had no idea on things so paid my life savings getting this car fixed) I bought a crate 360 and put in the car after that I had to get smaller wheels for the front because the car sat lower and the tires rubbed on the drivers side fender, not the other side, but now the car is really out of line to keep the front end high enough to keep the headers from dragging the ground...my question is why is it doing this and how can I make the front end higher without taking the car out of alignment, would coilovers help or what would be a good way to fix it.