TayGt

I have a 03 gt and want to do a 4v swap how hard would this be? Do the heads just bolt up? Do the 96 to 98 4v heads bolt up? What works?

Mark99GT

Ill make this short. It would be easier/cheaper to do an entire 4v engine swap. The resulting sub 9:1 CR from a 4v head swap would suck for ann/a application. So, yes the heads will bolt up, but there is a ton of extra work/parts required....

defconfire

What about an FI application? I never really looked into this as a feasible option, and wtf would you do about the valve timing?

Mark99GT

You'd still have the crappy 2v rods and pistons, so in an f/iapplication you would'nt see much benefit.

As for the valve timing, you would need the complete 4v camshaft timing setup, 4v ECU, intake manifold, throttle/cruise cables, the list goes on...