How to remove engine - weird mounts?

[davepl]

My 1970 GMC 402 has mounts that I've never run across in a passenger car. Normally when I pull the motor there is a long horizontal bolt that runs through the mount, but this doesn't have that.

The mount bolts to the chassis stand with a single big bolt that runs through the stand -towards- the engine; unfortunately that bolt head is 'protected' with metal tabs that are tough to bend away.

The shop manual doesn't show these locks on the V8, and it shows the stands as riveted in (mine appear bolted).

I could alternatively remove the stands with the motor, but they're not that easy to get at either (by myself, anyway, since they're a nut-bolt combo).

Anyone familiar with this style of mount, and know the best way to get the engine out?

Thanks!
Dave