head swaps

[gonen60]

will a turbo head bolt up to a non-turbo head? I heard the blocks are pretty much Identical but wasn't sure if this would work. If so what are the benefits are far as power? or is there no gain?

[1ViciousGSX]

A turbo head will not bolt up to a non-turbo head. :p

But the heads will interchange with the blocks. ;)

[EclipseGST]

Ok, you need to post what year you are asking about. Also, why would you bolt a turbo head up to a non-turbo head? I'm guessing you ment bolt up to a non-turbo block?

1990-92 Turbo heads will bolt up to any 1990-94 non-turbo BLOCKs.

1993-99 Turbo heads will bolt up to any 93-94 block but need to be modified to fit on a 90-92 block to accept the larger head studs. 1990-94 all use the common 4g63 casting block. Turbo blocks just have a few more options.

95-99 non turbo's have a Chrysler 420a block. Completely different than the turbo motors so in return, no turbo head from a 4g63 motor will bolt up.

[gonen60]

Sorry I did mean the block. What type of power gain/benefits would I expect if I did this?

[Kracka]

Sorry I did mean the block. What type of power gain/benefits would I expect if I did this?

Turbo cams in the NT would give you a slight gain. As for the actual heads...

[s1ngletracker]

is larger head studs the only thing that changed between 92 and 93 blocks?

[EclipseGST]

No... 93's have 7 bolt cranks, different crank case covers and oil pans. Piston squirters are different to - non removeable.

[s1ngletracker]

wait... it was in 93 that they switched to the 7 bolt motor?? I thought it was like 95...

[EclipseGST]

It was actually April of 92. So some 92's have 7 bolt motors but its pretty rare to find one.

[Shane@DBPerformance]

The heads are pretty much the same, besides the cams.