"Its a 1959 Lincoln 430 with a big isky solid lifter cam, old Crower u-fab 6x2 intake, and a joe hunt magneto.
What i need your help in is what parts are interchangeable with the FE series engine.
And i need a set of valve covers for my project where could i find a set."
Most of the valvetrain is interchangeable (not cam). The FE adjustable rocker arms, the shafts, etc. The distributor is supposedly interchangeable.
That Crower intake is going to be a bear on the street..
As for rocker covers, MERC made a custom aluminum set as a part of their Super Marauder option in 1958. Finding a set and being able to afford them will be a trick. The 58/60 MERC OEM covers are stamped and have the M on them. There were aftermarkets made (CAL CUSTOM-OFFENHAUSER) and you may find a set of those through a specialty shop like VINTAGE SPEED. I am fairly certain that LINC put chromed covers on their 3 x 2 package in 1958.