Just bought a 98 commander with a new engine from the second owner I bought it from the third owner. Guy said it was a 454 but I'm not sure I cant find a serial number and cant seem to find a casting number either. It has a mechanical fuel pump boss but its blocked off. It has a 10 bolt timing cover. And a magnet wont stick to the intake manifold. Please help thanks

Oh yeah and it's a serpentine belt

there should be numbers casting block , in front of motor, it would be on right hand side

above wear a oil filter would go if was a street car motor.




if it wasnt you on different thread, someone ask same question

u can see how clear the numbers are,,,this is a mark 4 block
dont know gen 5 or 6 are that much different..
you should be able to surf around and get info .

good luck

Mark IV Bowtie block, 4-bolt main.

hello bridgeman,,,yea thank you , i know what i have ,,trying to show ....... rspillman88............. where to see numbers

thanks..

the D14.90 cast in the rear of the block could be April 14th of 1990 in automotive terms, while facing the engine there is a machined pad on the front left of the block where the starboard head bolts on see if there are two sets of #'s there it could be a 454 truck block

14015445

Details for 14015445

Casting Number14015445 date1978-1990 454, 2 bolt or 4 bolt

Serpentine could be off a 99 or so MPI engine. Alternator on top starboard side.

i will add that even if you had a 330 hp mercury marine engine with this casting number it is a 4 bolt main block.