1955 vs 1958 Motor Mounts

[olskool68]

Howdy gentelmen. First post, long time follower. My son and I bought a '58 Fleetside as our project for his first truck a few months back. We've got the front clip off and getting ready to hoist out the 235. He wants to keep the old six in it. I got to looking at the number on the block, 3836233. Number indicates that its a 1955 engine.

My question is, what sort of mounts should I be looking for? Whats the difference between the 55-57 and 58-59 mounts? I see plenty of 55-57 mounts (studs and rubber donuts) available but nothing for the 58-59. Thanks folks.