I think the stainless nuts look fine I have source where you can get whit nuts which are the same shape dimensions etc if not i will make them , Its ok for people to say that they were not fitted originally , but on the other hand they would not of had 5 or 6 coats of paint nicely applied with finished flywheel rims , most engines would of had
1 coat thrown on and not even in the areas where the brush would not reach as i found on my 8horse m when i took the govener cover off and there was no paint apart from round the edges , So unless the purists are going to start painting there eninges with a 3" brush in one coat i think it is perfectly acceptable to use stainless nuts, as for tensile strength SS will surface just fine when you think how over engineersd most engines are with regard to the amount of fixings .rgds bob