Whats the best big bore kit for the z and how much does it cost?

 

I don't know about the price but i hear good things about the
yoshimura kit.

 

yosh does a great job on 440 kits
they bore it and reseal the cylinder ( not sleeved) thats the better way to do it
as for cost you need to call and find out it all depends on what you want done
I spent close to $2000 on my top end (bored, piston, cams, port/polish, new carb ect)
so it all depends what you want done.
if you want just a 440 kit your looking aroung $250/400 installed depending on who does it

 

how does it compare to a 450 with a cheaper bore? my friend has one he wants to bore out he said he found one that bored it to like a 463 or somethin for like 300 or somethin.

 

That wasn't very vague at all.