I have 65ft so I hope it'll be ok. The new nose will be a different color so that removes 3-4ft.
Sorry about the comment on the door, you have an R so this does not apply to you. I remembered that when I went to sleep last night (I think about 818 stuff 90% of my days and nights).
I'm amazed you managed the center of the rear bumper in one piece, that must have stretched a lot on the backup/TS lights but you made it.
I measured last night and I have 25 feet left over from the 75 foot roll and there were 3 attempts on hood so I would say that with 5x50 foot roll you will have plenty and a little left over.
Tony Nadalin
2018 SOVREN Big Bore Champion
2015 SCCA Oregon Region VP3 Champion
2012 ICSCC ITE Class Champion
FFR MkII Challenge Car, Spec Racer, Street Legal, SCCA, ICSCC and NASA Racing
818R Build in progress