351W rockers.

[bly]

OK, now I am wondering if I have a more serious problem than first thought. To give a little history on engine, Its in an 83 mustang I have had for years, engine was built probably going on 18 years now. I drove it maybe once a year. Now that I am without a Cobra I have been resurecting Mustang.

Engine ran smooth and was really quite. Head gasket blew, fixed that, then decided I would put in a bigger cam. That is really the time I did start having valve train problems. After new cam installation I had a heck of a time getting valves adjusted, they never were as quite as before new cam.
I also had a strange sound, a very intense rattling, almost like a bad lifter but faster, but it was at faster RPM's.

I started to pull motor apart again to find problem, found nothing on top end, but when I pulled pistons I had a broke ring on #5 I beleive it was. I reringed pistons and new bearings, put back together, nothing else new except lifters. Now i am having this valve train problem again. I havent noticed the strange sound as I have not really reved motor much.

Is it possible I did go to big on cam? Here are the specs @.050 Int is 230 Exh is 236. valve lift .519 Int and .523 Exh. I have an old set of Aluminum heads, they are Alan Rute or something like that.

Any ideas???