Not sure if New Head will work?

[91whiteGSX]

Hey hows it going.. ok I got a used 4G63T head couple months ago... The guy told me it was off a 1G car but wasnt sure of the miles.. so I got it pretty cheap... Now the thing is I was looking at the head.. and its a little diff then my old one... for startr's my old head says on the side.. 2.0L with a 6 under that and a M ... Now this new head has 2.0L with a 5 under it and the same M .. but also i dont know what its called but on the right side of the head.. by the cam sprockets In the top of the head.. I think it has to do with the oil My head says 1-2 with a arrow pointing to the back of the head and 500 566... dont know what any of these mean .. but the other head doesnt have numbers at all its a smoth cap.. so im not sure what to make of that If anyone knows what any of this means that would be very helpful I dont want to mess anything up.. cause for all I know the guy lied to me just to sell the head.. so let me know K thanks for your time .. !!

 

[mitsu_matt]

Look at the intake runners on the head. 1G intake runners are much larger than 2G. Unless the 2G was ported.

 

[ShadyGST]

The CAS on the 1G is different in the 1G.