Dropping 318 LA engine in 62 B body

IIRC, you need the engine brackets off the poly 318 so they fit the rubber mounts that fit the K-member. I think you have to modify the engine bracket ears to fit a 273. The span between the engine block bosses are the same, but, even though they use 3 ears on the block, I think they use a different 3 between the poly 318 and a 273. It's a matter of cutting off an ear on the bracket and welding it in the correct spot for the other engine boss. It's a similar mod you need to make to swap in an LA 318, 340, or 360 in place of a 273.