5.9 magnum or 440

I'm looking to put together a nice street strip car I have a 70 dart I picked up for better deal then expected well its slant 6 and I have two engines siting in my garage one 5.9 magnum and other is mid 70s 440. The 440 would need complete rebuilt but magnum will not . What's going to be my best bet to hit 12.5 or faster in 1/4 (I know other factors will need to be considered) I read some people are just doing cam heads intake carb on 440 and doing well but what will be the easiest on my pocket