Consult your machinist. It will depend on why they were fitted in the first instance.

so i discovered that my block has been sleeved. do i have to buy new sleeves? or do i have to remove them and work on the original cylinders? can this be done? (remember that im going with a14 bore maybe a14 + 1mm over size):(

A good A12 early style cam?

For 6000 rpm peak power, the stock cam is very good.

If you don't want to rev that high, order a custom cam, ask for a "mild" cam and tell them the Rpm range you desire. Iskenderian out of California charges about $100.

DCOE is best. It's fully tunable. The 32/36 is not, but has fixed venturis. But it works OK.

i have found a 32/36 weber if i cant find the other 40dcoe i thing i will go with the 32/36 what do you guys think is best?

is it a front dizzy camshaft? cause i think not :/ i think im going with a14 pistons maybe 1mm oversize for 77mm bore

Not easy to find. Weber seems to be all out.

For a good camshaft use Nissan 13001-H6200, good for peak power at 6000 rpm. Works great with Weber DCOE 40.

:) i just found a 40dcoe weber lying around in my friend's house one more to go! if i cant find the other one i will need a single 40dcoe weber a15 manifold are they easy to find??? how about a good camshaft? and how much do they cost i want all those things so much :( haha!

Great To See you start the thread about your Sedan,I like everything you did to it Especially the Big Brakes!
For exhaust-I would go 1 1/2 inch Primaries then 2'' then come out to 1 3/4 Pipe With a semi flow Barrel,Great sound,like a suburu haha .If you like u could check out my thread for some pics http://datsun1200.com/modules/newbb/viewtopic.php?post_id=440599#forumpost440599
I think the stock fuel pump is good for twins.

> 1- I need you guys to tell me which pistons can i use (remember 78mm and flattop)? (best option for me is that they came from another car doesnt matter the brand)

The popular swap is Subaru Justy Piston Swap -but thatisfor A15

For A12, 78mm is too big I think.