I'm trying to do some serious upgrades to my truck. I was looking at the camshafts from Crower to add for some added horsepower at mid to top end range. However, I've always wondered if I could convert my 2 valve engine to the 4 valve like the cobra. I know the block is the same and the heads should fit but is there anything else that needs to happen ie: wiring, ECU, etc.

 

You'll have to have an upper/lower intake assembly from a Cobra in order for it to match up properly, along with (possibly) new exhaust headers and such. ECU will need reprogrammed for added horsepower, and you might need to update your fuel system depending on how much HP you have right now.

-Flea

Edit: Also, you'll need to get a new timing chain cover for the DOHC... a Cobra unit will probably work. Forgot to say that E-bay probably has the heads cheap ($300 or so, if you can find them). Also, welcome to F150online!