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Old 10-08-2007, 02:12 PM   #1 (permalink)
mike67
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Default DOHC Heads

Will DOHC heads off of a '98 cobra engine fit on a '98 SOHC GT block?
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Old 10-22-2007, 09:19 PM   #2 (permalink)
Tape
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Default Re: DOHC Heads

Yes, all 4.6 heads will fit all 4.6 blocks
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Old 11-01-2007, 07:04 PM   #3 (permalink)
collinjay71
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Default Re: DOHC Heads

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.
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Old 11-15-2007, 10:13 PM   #4 (permalink)
collinjay71
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Default Re: DOHC Heads

98 cobra heads have a 52cc chamber and 98 gt heads have a 51cc chamber so your compression would drop very slightly.
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Old 02-16-2009, 08:00 AM   #5 (permalink)
saleen#255
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Default Re: DOHC Heads

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.
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Originally Posted by collinjay71 View Post
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.
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