1988 dodge d150 starting problem

i have a 1988 dodge d150 that takes 3 to 5 second to start after turning the key til it start up it has a new battery ,it burns

a little oil 180k change plugs about 30k

ago is it time for new plugs could that be cause of the hard starting motor 3.9 with

5 speed trans just started doing this month

ago thanks for any help

How about the fuel pressure? Have you changed the fuel fllter(s) recently?

sure, did last week it was kind of dirty