oops my mistake, i tend to over think everything im analytical like that at times
i couldn't even begin to help you, almost seems like it would be specific to a particular thermostat
some thermostats have different designs and flow capabilities, there are many different diameter thermostats as well, some have a single bypass some have 3 some have none
then the housing itself on some engines are a 90* such as my ls1 camaro, where as some are mounted in the intake manifold inside a 45* elbow while others are mounted with a 90* and everything in between
wish i could be of more assitance