With 80 Percentile in JEE Main, your CRL will be anywhere around 220k, your SC Rank will be anywhere around 12k. In spite of being from UP Home State Quota, I dont think you'll secure a seat in MNNIT. You need an SC Rank of atleat 6k for that. As far as other options are concerned, you may get a seat in some of the Good GFTIs like SLIET Longowal, NIFFT Hatia and many others.

I belive being from SC Category you have fair chances of securing a seat in UP State and Private Engineering Colleges under UP State Engineering Counselling. For more information and Cutoffs do follow the link below

https://engineering.careers360.com/articles/upsee-cutoff

For more information and college prediction do follow the link below

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer