>>28572116
>>28572125
As far as fluids go, I'd recommend mishimoto liquid chill for coolant, as long as it's compatible your engine chemistry. Just does all the things you want in a coolant well without worry. Redline supercool is also good.
Brake fluid you can't beat react srf or torque rt700. Alternately, gulf rf800/1000 motul rbf600 or amsoil synthetic if you want to pinch pennies. (If you want to go out there with prestone max you're too cheap to do this as a hobby.)
High viscosity engine oil is a must, and also formulation quality is a must, to protect the engine from the abuse you'll give it. SAE 40 grade minimum, 50-60 ideally; just make sure its cold flowing viscosity is also compatible with what your engine expects. You can go with hpl pcmo premium plus or 'bad ass racing oil' in 5w-50 or 0w-40, depending on the time of year/your local conditions. You can also get your transmission and diff fluids from them. Your 'civic' calls for winter 0 grade but if it is real hot then the 5w-50 could also work/would be better. There are a lot of other brands that sell 50 grade oils too but these are also often just as expensive for less quality at the same time. Penzoil ultra platinum 0w-40 can work in a pinch if you need something from a grocery store right that day for whatever reason, just make sure you change it quickly.
In the old days of hydraulic steering people would often just top it off with spare atf and it would work fine. From what i hear honda specifically makes its steering housings out of stuff that will disintegrate if you don't put their proprietary fluid in it though. May or may not be apocryphal, but probably not worth the risk.
Finally, swap the engine out for an Elmer Thor 4L i4 v2. They machine the blocks to fit your transmission so u can just callem up bro.