Ok, how about these World Product heads?

TECHNICAL SPECS

Casting ID Number: I-058
Material: High density cast iron
Valve Seats: Intake (integral), exhaust (hardened)
Valve Guides: Integral cast iron
Spring Seats: Machined for 1.560" and 1.250"
Valves: Manley stainless steel valves in assemblies (inconel exhaust valves on marine applications)
Valve Diameter: 1.940" intake, 1.600" exhaust (11/32" stem)
Guide Plates: Special World part #830460-8
Rocker Arm Studs: Screw-in style
Rocker Arms: Adjustable rockers recommended. 1.6 ratio (use of 1.73 ratio will require elongation of pushrod holes)
Intake Runner: Standard port location
Exhaust Ports: Standard location (dual exhaust bolt pattern to accommodate large custom headers)
Spark Plug: 14mm 5/8" .460" reach tapered style
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised
Valve Angle: Stock 20°
Accessory Bolt Holes: Stock
50-State Emissions legal

Spring Specs
1.250": 100 lbs. @ 1.810", 300 lbs. @ 1.250", coil bind @ 1.200", max lift @ .570"
1.437": 125 lbs. @ 1.810", 340 lbs. @ 1.210", coil bind @ 1.160", max lift @ .600"
1.550": 200 lbs. @ 1.900", 480 lbs. @ 1.200", coil bind @ 1.150", max lift @ .700"

Head Flow
JR. @ .600 lift: 236 (intake), 169 (exhaust)

WINDSOR JR. Iron Heads
WINDSOR JR. Iron Heads

Don

I also have a set of 68-ish 302 heads that have had a little work done to them, but I figure what I will spend to get a good valve job on them could go toward something better.