Cast iron is a bit more durable than aluminum,at least I think so.. the wreckers are full of 40+ year old cast iron heads..I'm no metalurgical engineer. Just a jaundiced eye I guess!
LXguy,why not email them and ask if they have had the heads to the track yet? Maybe there hasn't been a websight update for a while. I dunno whats going on at that websight. Has looked the same for quite a while now.
