I have an a13 I was going to rebuild
but due to nobody knowing anything about them
I want to sell and build a a14 would anybody
know how much a a13 would be worth only saw 1 for sale
and that was $850

If my memory of what I've read here is correct it's a bored out a12. Rebuild it like an a12 keeping in mind the piston rings will be a different size. It's a good idea to measure the bores/ pistons before buying rings anyway. Everything else should be the same.

whats an a13? what do they come out of? or are they bored a12's? never ever heard of these.

are these rare or something?

gg Datsun it came in my 1200 ute

yeah but is it like a bored out a12 or what?

havnt pulled it apart just look at engine number and was a13- plus numbers

There are 2 types of A13, short block and tall block
Chances are your 13 is the short block and was a jap import back in the 80's
they are favoured by historic class racers and therefore a bit more desirable and valuable than the more common A12,14,15.

So what's the tall block then, an a14 block with an a12 crank and longer con-rods? Odds on DD knows as well, he's a bit of an encyclopaedia on this sort of stuff.