Technical & General Discussion Area > Boss Pitstop
boss 351
D0ZX:
No Cleveland ever came with screw in plugs. This includes XE Nascar blocks. They can be fitted, Ford used to stock them. Have installed them in my block that I am using. Thirsty 390 helped with sourcing a tap.
A friend of my dad nearly cooked an engine when it spat a standard welsh plug out. I don't trust press in plugs.
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