62 lancer gt production numbers aluminum block.

if you mix your own coolant with water use only distilled water. Electrolytic corrosion eats those block pretty badly.

"gaskets are different and hard to find"

Hmm... what I'm hearing here is that, unless you have serious performance ambitions for your Dartiant, you might want to actually avoid using an aluminum slant six, if you have a choice.

Personally, I wouldn't go out of my way to look for one.