Help with late fathers ‘68 SS

I inherited my dads 68 camaro after he passed suddenly. It’s modified somewhat for racing and I’m just not sure how to go about maintaining such a vehicle. I’ve had old cars in the past but this is different. I’d like to be able to check and change the fluids and keep up on it, I just don’t want to screw it up. It leaks a little, what I think is, motor oil but I can’t find any dipstick to check the levels. It has a deep aftermarket pan so maybe there isn’t one? There was also a sensor unplugged so should I plug it back in? I plan on keeping it plugged in to a tender in The garage, I’ll probably put less than 100 miles on it a year. If you think I should know something I would love to hear it, Any help would be so greatly appreciated! Thank you!