akintosyali
New member
I pulled the head of the port engine as it lost compression, took it to the machine shop (very reputable, they know their stuff) and they called saying my heads have multiple hairline cracks and they are beyond repair.
Here is the issue:
the casting on the block is :2406730: So this confirms I have a 1963-65 426 RB Bigblock wedge/Maxwedge block (based on this link: https://www.enginelabs.com/engine-tech/a-guide-to-mopar-v8-cylinder-head-and-block-casting-numbers/)
The casting on the headers are 2406516. this is for a
1964-1967, 361/383 B/RB-series big-block, 2.08/1.60 valves, 73.5cc (not a wedge!)
Instead, it should have been:
2406518 – 1964, 426 B/RB-series big-block, 2.08/1.88 valves, Max Wedge, 86cc
There are NO cast iron replacement heads. The only thing I can find is replacement aluminum heads.
Replacement options for a 1965 wedge engines are:
Edelbrock E-Street Cylinder Heads for Big Block Chrysler Part Number: 350-5090
Port Volume: 210cc/70cc, 75cc Combustion Chambers, Valve Size: 2.14"/1.81" OR
Edelbrock E-Street Cylinder Heads for Big Block Chrysler Part Number: 350-5093
Port Volume: 210cc/70cc, 84cc Combustion Chambers, Valve Size: 2.14"/1.81"
The first head is closer to the current heads for cc volume. The second one is close to the cc of a wedge, but neither replacement head has the same valve sizes.
I am stumped! Any advice would be highly appreciated.
Here is the issue:
the casting on the block is :2406730: So this confirms I have a 1963-65 426 RB Bigblock wedge/Maxwedge block (based on this link: https://www.enginelabs.com/engine-tech/a-guide-to-mopar-v8-cylinder-head-and-block-casting-numbers/)
The casting on the headers are 2406516. this is for a
1964-1967, 361/383 B/RB-series big-block, 2.08/1.60 valves, 73.5cc (not a wedge!)
Instead, it should have been:
2406518 – 1964, 426 B/RB-series big-block, 2.08/1.88 valves, Max Wedge, 86cc
There are NO cast iron replacement heads. The only thing I can find is replacement aluminum heads.
Replacement options for a 1965 wedge engines are:
Edelbrock E-Street Cylinder Heads for Big Block Chrysler Part Number: 350-5090
Port Volume: 210cc/70cc, 75cc Combustion Chambers, Valve Size: 2.14"/1.81" OR
Edelbrock E-Street Cylinder Heads for Big Block Chrysler Part Number: 350-5093
Port Volume: 210cc/70cc, 84cc Combustion Chambers, Valve Size: 2.14"/1.81"
The first head is closer to the current heads for cc volume. The second one is close to the cc of a wedge, but neither replacement head has the same valve sizes.
I am stumped! Any advice would be highly appreciated.