. as long as your sure of your work then no problems , there is a few different head gaskets but you need to know the shapes , look up correct type . only way i know of for sure is the cover stampings , other than that its a guess at close to an age . oil plug / where is it n stuff like that . bottom of sump low down is really early , surestart is different again , points . no points , its why not many do it and guarantee it , if they come here with no tinware they are wrecked out for parts . i couldnt do it to someone unless it was a rebuild with no age . how do you know they only need a decoke ? you have a way of checking rod knocks on a non runner ? if its smoking ? excessive oil use ? worn rings ? bad valve seats ! or just fit it to a spare base and run it i hope
just my thoughts
