DOHC Heads

[mike67]

Will DOHC heads off of a '98 cobra engine fit on a '98 SOHC GT block?

[Tape]

Yes, all 4.6 heads will fit all 4.6 blocks

[collinjay71]

all heads are interchangeable but you will also need all the diffrerent covers, intake manifold, throttle body . I think that the timing chains are even interchangeable but the DOHC uses a polished chain. I'm not sure what your compression would be with the 98 pistons, but i'd check into it.

[collinjay71]

98 cobra heads have a 52cc chamber and 98 gt heads have a 51cc chamber so your compression would drop very slightly.

[saleen#255]

So with my saleen thats only a sohc 281, I can bolt up to be a DOHC with the right componets I understand that. However Would I have to change anything in my wiring harness, and ecm (comp)Thanks,oh and this is my first time lookin around on here, very good stuff here, also I am planning on runnin this engine up to around 400 to 500hp max, and I have a bad clutch right now, would you steer me in the right direction to a good performance clutch on the inexpensive side, on a budget right now, and only pushin approx 340hp at the moment. I just need a good enough clutch to handle a couple minor bolt ons, around 400hp for now. Sorry for the mix up.. Thanks in advance for the replies.

Originally Posted by collinjay71

all heads are interchangeable but you will also need all the diffrerent covers, intake manifold, throttle body .* I think that the timing chains are even interchangeable but the DOHC uses a polished chain.* I'm not sure what your compression would be with the 98 pistons, but i'd check into it.