auugh! a headgasket question. maybe i'll get some input 
i have a new in shrink wrap toyota shortblock for my project going together. using a hks 1.2mm hg, should the deck be lapped? the factory toyota finish is really nice, but is it smooth enough for mhg sealing? id hate to screw with a perfectly good finish if i dont have to. the head surface was machined and it is a very nice finish as well. if you run your fingernail over the surface you can just barely feel the machine marks. not sure if this is good enough or not. so i just want to know a fresh from toyota block and a fresh from the machine shop head should be touched or leave well enough alone. i have yet to find any info on anyone using a mhg on NEW shortblock.
thanks for any input.
dave
i have a new in shrink wrap toyota shortblock for my project going together. using a hks 1.2mm hg, should the deck be lapped? the factory toyota finish is really nice, but is it smooth enough for mhg sealing? id hate to screw with a perfectly good finish if i dont have to. the head surface was machined and it is a very nice finish as well. if you run your fingernail over the surface you can just barely feel the machine marks. not sure if this is good enough or not. so i just want to know a fresh from toyota block and a fresh from the machine shop head should be touched or leave well enough alone. i have yet to find any info on anyone using a mhg on NEW shortblock.
thanks for any input.
dave