I have a good pair of rebuilt 360 heads from an 83 Chief and was going to use them on my 76 Chief.
Question is, the valve springs on the 76 are slighty longer and tighter than the ones on the 83 head.
Should I swap the springs over, or keep the 83 heads intact as they are.
The 76 is low milage snow plough, (40,000) but the heads are very badly carboned up, three push rods are bent into an S shape and several manifold studs sheared off. The truck has been sat for many years til I got hold of it.
Honestly, you need to check the seat pressures and ensure they match the cam specs. example, you run too light of spring and it will float the valves before peak power and run like crap. If they are too tight you will wipe the lobes right of the cam in 500 miles. Of course coil bind is important too. Higher lift binds coils then you break springs and drop valves kaboom.
06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
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90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!