Ok you know what you're doing. Sub-9 & pro card in 1st IM attempt with zero consequences to long term development. I'm glad you seem to be confident with each discipline. IM success is dictated by lifetime mileage/volume. 3-4k every day is good. That would put you over 20k every single week. An 8 hour ride is good but it's about stacking up 2-5 hour rides. 1hr/20 miles a day is fine. If you're doing that with 1 super long ride & think you're good then you could be in trouble. You just need to have a good feel for what lines you can't cross in training/racing. IM LP bike course is hilly. It's not about time trialing a best bike split. You need to ride for an effort that allows you to run well.