SR20 Red top or black top??? SR gurus?

[VQZ33]

alright everyone I know for sure I have a s13 motor but I'm frustrated to not know wether it is a blacktop or redtop. It has a red top but has the cooling fins on the front of the motor, it says 52f on the head AND the block, i have the fat 02 sensor (pretty sure, i havent seen them side by side but if i remember right it looks about the size of my old 300zx 02 sensor), my injectors are purple... I guess to rephrase do i have the 54c internals like the blacktop also with the updated oil squirters? any advice/info would be great.... i dont feel like taking off the oil pan to look at the oil pickup... I can add pics for those who are curious...