I like my Vic. Jrs. No porting, yet still capable of 6-teens in a 2600 lb maverick.
The AFRs are GOOD heads. But they cost nearly twice as much by the time you upgrade the springs, retainers, and keepers. Coulda built a set of big block heads by the time you spend $2k on the AFRs.
Z304's...buddy has a set on a 306 in a RX7. Nice heads! But, his combo leaves a little to be desired. 220 duration camshaft and 9:1 compression...and those heads=hahaha smooth idle and no low end. It is capable of SOOOO much more, if he'd invest the time and a little $$$. But he's happy and having fun racing, so I guess that's all that matters.
The ones from RHS "look" nice as well. I don't know anyone that's used them.
Another friend bought a set of chinese knockoffs of the Victor Jr heads. They didn't pick the motor up ANY over a set of ported iron E7TEs on a 393. The only thing that improved was the looks (and weight savings).
Yet another friend (yes...I have too dang many friends!) uses a set of brodix Track 1's on a 377w. They do a good job, and were worth about .3 over a set of HOGGED C9OE's. The old iron heads had been welded, filled...the whole thing. That was back when there were no aftermarket heads for ford small blocks....except the canted valve versions. I would have thought the T1's would have picked him up more than .3 and a couple mph though...and I seriously think that they should have been ported.
For the $$$ it's going to be hard to be the Edelbrock heads. Mine were under $1000 (I got 'em bare) and I already had the valves. The valves were actually a little longer than the ones Edelbrock sends with their heads, but it worked out good when I put the .745 lift cam in the motor. I'm back to a little .700" lift 270-274 duration solid roller now, and it seems to work the best...especially considering that I never have touched the heads with a grinder. Just had them welded up after a bomb went off in the bottom end a couple times and had 'em resurfaced a little...other than that, they're exactly as they were delivered to me.