John – reaction times vary just like on the starting line. Sometimes answers on this forum aren’t provided for days and days, and on occasion no answer is provided : ) Raising your chassis and supporting only front and rear is fine to work on in your shop. However, when transporting your chassis in trailer, for those times you want to add middle support to specifically answer your question. Depending on your chassis design, for me I place about 8” length support right under both lower chassis tubes directly in front of the engine. It prevents your chassis from unneeded flexing movement and doing potential chassis damage during transporting.
All I would add for your first time fluid examination, check the levels first to see where they are, and verify level meets design specifications. You may have to contact Strange, and let them know what you have, as race vehicle differential housings do vary. Then after you drain and check for condition, if for example the Strange rear oil checks out okay, myself, I would reinstall. For engine oil, since you’re running gas, I agree with what Dusterdave wrote. For me, more important is checking for fluid leaks to address, leaks are a nuisance and cause trouble. Alan