Even possible ?? 87 TC motor, went and picked up d-port head number three today. Cracked in 3 places. They are now officially piling up. Can I use one from an n/a mustang single plug ?? As they are pretty abundant.... Getting really pissed now, I want to get the move on with my motor, but i've spent over 100 bucks now on cracked heads with burnt valves.... I have nothing but crap now.... I can't find an oval port head ANYWHERE so it's not really an option.... What will definitly work and what will not ?? I'm mostly worried about the compression, and sorta worried about flow. Thanks