how much power can i xspect in givig to the n/a some mods like:
-irinium plugs
-cat bac
-inox exost colector 4--1 (2.5')
-home made cold intake
-k&n
-polish and port head
-amf spring ajust
?

PORTUGAL!?! Sorry for givin' you a hard time man.

no problem dude!!! lol

my friend has an other supra mk3 targa 7mgte but it has 100.000miles and he is asking 4000? more than the n/a...is it worth?i do like the speed&power!

4000 more than the n/a? I would go with the n/a and do the swap personally.

shes no man get the N/a it is a five speed right...then before you decide to swap in the 7m build it up while its still out the car because itll be a pain in the ass to remove it again remember prep the head correctly if you can use a metal head gasket and torque it down to 75-85ftlbs on the head bolts and use ARP bolts/studs