[SFfiredog]

I've built 2 cammers and they are awsome engines. The wive's tales about unreliability, like timing chain issues are just that, BS.
The two major drawbacks (besides price) to cammers are:

Weight.
The vast majority of cammers have cast iron heads. There were aluminum heads cast but they are extremely rare (expensive) to find in usable condition these days. That being said, a fully dressed cammer can weigh close to 750 lbs, maybe more. As Keith stated, you can build an all aluminum FE with the same HP for less price, and it will weigh close to 300 lbs LESS.

Size.
The only Ford cars that a cammer will fit in without major modification is a full size Galaxie/Maurader or a 69/70 Boss 429 Mustang, which happens to be where you see most cammers residing.

--Mike