stuck and rust spark plug

[67Dart273]

I hate to be the bearer of "news" but aren't those heavy truck heads, IE tapered seat plugs?

Note to OP. Please learn to resize your photos to 800 pixels or less on the largest dimension. It REALLY screws up the page

This has been scaled to 800 x ........

 

[alex_borges_br]

I hate to be the bearer of "news" but aren't those heavy truck heads, IE tapered seat plugs?

Note to OP. Please learn to resize your photos to 800 pixels or less on the largest dimension. It REALLY screws up the page

This has been scaled to 800 x ........

All headers we have here in Brazil present tapared seat plugs.
We also have a modified header that was used in a small amount of alcohol vehicles during the period of 1979 to 1982 (or 1983)

 

[67Dart273]

I guess you mean cylinder heads. That IS interesting

 

[alex_borges_br]

I guess you mean cylinder heads. That IS interesting

the alcohol cylinder heads presents 45cc combustion chamber.
A friend said that it also has a water in the middle (I think to heat the alcohol in the intake)