identifying manufacture of heads

[badfish]

My nephew and I recently bought a 93 lx 5.0. The engine has had some work done to it, bored out to 347, aftermarket cam, exhaust system, mds, cold air intake, edelbrock intake, 24lb injectors, ceramic headers and aluminum ported and polished heads. We are both very green when it comes to cars (other than hit the gas and it goes). We are trying to determine what type of heads are on the car. The only markings on the heads are toward the front and looks like SVO but in a cursive style of writing or it might just be some sort of symbol. Any help would be appreciated.

[91saleentwinturbo]

if you can take a picture with the best view of the heads as you can and post the picture would definetly help. they sound like ford motorsport svo heads early editions but hard to say with out a photo.