im going to be working on my 799 heads, little more port work and finish. ive bought the cut down(ls3)2.04 intake valve so far, I need advise on what brand of 1.60 to buy? where they almost be same length as the 2.04..

Thanks for any help.

 

I like REV and Ferrea valves.

 

Another one you might consider is the LS9 exhaust valve. I don't have a weight for it but I know it is 1.590" with a 8mm sodium filled hollow stem.
The problem with it, that may make KCS suggestion better, is that the groove for the retainer locks is not in the same place. You would need retainers made for that LS9 exhaust valve. Otherwise, your installed spring height would give you more pressure than you would be expecting. I believe if you buy the Brian Tooley .660 duals, he can substitute 8 LS9 retainers in his kit.