Magnum pulley bolt pattern

[minty]

I wonder if some can help,i am finishing up my swap from 318LA to Magnum 360 and have it a snag,trying to put the LA pulleys onto the magnum damper but the six bolts wont have it,i can get 5 in but not 6,is the bolt pattern the same on the magnum and la dampers,have searched but cant find the answer :help:

 

[66plyValiant]

I always thought you had to use the LA damper if your using the LA timing cover

 

[green1]

Elongate the one hole.

 

[minty]

Thanks for the replys,ive used the early magnum cast damper,i thought the LA dampers were weighted different
i assume the pulleys have have nothing to do with the balancing so i think i will elongate as suggested,many thanks guys