I think you mean you'll have problems 'checking' your oil, not changing, correct? Either way, you can't block your dip stick. You'll need to adjust how your exhaust is mounted so you can access the dipstick.
If you can get your dipstick out of there you can find a funnel with a Z bend in it that can work in those tight spots. either that or get a funnel with a flexible hose to feed it in the oil fill hole.