Originally Posted by Lilmike1988
Good decision 351 has good torque and good hp numbers
+1. I think you can hit your HP goals pretty easily and safely with this block. I wouldn't bore it to a 427. It would sound even meaner, but I think this would weaken the cylinder walls a bit. For more reliability, stick with the 351.
I've seen some AC kits that should work for your car (I think it was in Mustang Monthly a few months ago). I'll check to see if I can find it.
Should be a great build! Good luck and keep us posted.