Hey guys I was wondering if the 98 accord 4 cylinder doors would fit onto a 98 6 cylinder 3.0

 

You can look up part numbers and illustrations from online Honda parts dealers. Even your own local Honda dealer should have an online store.

These are two that I buy from all the time:
Majestic Honda -Honda Automotive Parts.com
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Honda OEM Parts Online

Look up the your car's details and get the part numbers. Then compare them to the donor parts car that you would like to get the doors from. If they are the same part numbers, then you have a match. You may need to move some other items (hinges, locks, trim) over to make everything work, but the main part would fit. If the numbers don't match, then you have more research to do, because sometimes they will still work.

1998 Honda Accord DX I4
Panel, R Front Door (DOT)
67010-S84-A90ZZ
Panel, L Front Door (DOT)
67050-S84-A90ZZ
Skin, R Front Door
67111-S84-305ZZ
Skin, L Front Door
67151-S84-305ZZ

1998 Honda Accord EX V6
Panel, R Front Door (DOT)
67010-S84-A90ZZ
Panel, L Front Door (DOT)
67050-S84-A90ZZ
Skin, R Front Door
67111-S84-305ZZ
Skin, L Front Door
67151-S84-305ZZ