Those heads are good, They are 100 cc heart shaped chambers. They are large oval ports, and have no heat riser passage. They came on Gen 6 engines and I would call scoggin dickey and ask if they work on a Mark 4 block
(coolant passsages).
They use a Net lash type rocker assembly. You need to have the heads drilled to accept Mark 4 adjustable Rockers or buy a set of studs with 3/8 ends on them (Competition Products)
The Exhaust port has a D shape to it that allows for a nice short side radius (port floor) This is the drawback to the standard BBC heads IMHO.
If they bolt on a Mark 4, I'd use em in heart beat!
HTH
BLOWN
[This message has been edited by 68Malibu Blown 406 (edited 01-08-2000).]
(coolant passsages).
They use a Net lash type rocker assembly. You need to have the heads drilled to accept Mark 4 adjustable Rockers or buy a set of studs with 3/8 ends on them (Competition Products)
The Exhaust port has a D shape to it that allows for a nice short side radius (port floor) This is the drawback to the standard BBC heads IMHO.
If they bolt on a Mark 4, I'd use em in heart beat!
HTH
BLOWN
[This message has been edited by 68Malibu Blown 406 (edited 01-08-2000).]
