You might like this write up, it answers almost everything
https://www.svtperformance.com/threads/difference-in-2001-cobra-heads.745711/
https://www.svtperformance.com/threads/difference-in-2001-cobra-heads.745711/
Ive decided I'm going with the 03+ 4v heads, I can get a set from an aviator for $154. Ive also decided to go carb for the moment with the Sullivan intake.You might like this write up, it answers almost everything
https://www.svtperformance.com/threads/difference-in-2001-cobra-heads.745711/
Ive decided I'm going with the 03+ 4v heads, I can get a set from an aviator for $154. Ive also decided to go carb for the moment with the Sullivan intake.
My local junkyard has three 03 aviators in the yard. I honestly don't mind lapping valves or replacing valve guides.03 Aviator heads for $154 is a great deal, just realize that they are probably gonna be another $500-$800 for a shop to go through everything unless you fancy lapping 32 valves yourself and have the tools to do the guides. I've never seen them that cheap myself, just make sure they are actually 03+ heads. Look up the correct serial numbers. I mean even if they are 99-02 heads that is still a screaming good deal for them in good shape. I personally love 99-02 style heads, they are dirt cheap and the price to performance difference between them and the 03+ heads is nil.
That is the plan.Skip the PSR, uneven air flow and other issues.. Holley ECU/Sullivan/ and power adder of choice with cams matched for that. Don't go throwing random ass parts on a engine or else you won't be happy with your out come. Plan your build out and built it accordingly. If you're looking for 7500+RPM go with a sullivan.