I’m backdating a 4.2L to use in a D-type project.
I’m looking into a triple 4D8 SU setup from a 3.8L vehicle.
Would the intake be interchangeable with the 4.2 head?
Are there any pitfalls with this idea?
I appreciate any and all help.
-John
Sorry guys, now that I’m in the shop and looking at the head I see the additional jackets.
The coolant ports on the head are blocked with brass hex plugs on the 3.8.
Most 3.8 have a B-head, only early 3.8 E-types had Straight port heads.
They do not interchange, as all 4.2’s have SP heads.
I really appreciate the input,
I like the plugs as a solution. Is there any down side?
Nope: just make sure to use thread sealant, and tighten them properly.
For all those looking for the answers… the passages on my cylinder head were 1-5/64". The Melling part number is MPC-174.
Stay thirsty my friends.
-John