I just pulled a head on a 355 with corrosion around a single head stud. That was bad enough to take all day. Got me to thinking, did someone design a head puller jig for a 355? This is common enough of a problem on 308 that there are tools for this out there. One can mount a plate to the top of a 355 heads using the number of M6 studs, but where would the pressure be put against the block / head studs?