Hey all, in need of help with my project that i will list now. The car is a 85 sb coupe that i purchased as a complete roller, by complete it came with a 94-95 5.0 and T5. This 85 was a v6/4cly car, the engine harness is from an 86 5.0 along with the o2 harness and a A9P. I have changed it over to maf and used houseofdulas video and did exactly as him. The car left me stranded with what seem to be a bad PIP/ TFI so i purchased a replacement distributor and a TFI relocation kit, along with a BAR sensor to fix code 21. After putting all new parts in i decided to check fuel pressure which i found set at 50 no vacc i dropped it to 40 and set timing, now the car gave me a koer 41,91 code and feels like it has a rev limiter at around 2k rpm that never goes above or past 4k but it idles perfectly fine. I feel like it's one thing after another, not sure where to look since all information i've found on these codes relates to 87-93 o2 sensors. Engine has aluminum heads, tfs1 cam, LT, edelbrock 5.0 intake stock maf and tube most sensors are new including the o2s, where do i begun my trouble shooting?