can you weld?
not are you planning to learn, but do you own a welder, understand how to properly use it, and understand what types of metal you need.
ORRRRR
are you ready to pay a shop to do this
if you answered NO to both of these, please dont continue your quest for a ka-t in a ae86, as realistically its not going to happen, so us walking you thru figuring out how to do it will completely be a waste of everyones time.
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i like wayfarers.