Need GMC info For Rockauto return

[AZKen]

What engines were available in 1963 GMC series 1000? they sent me wrong vacuum advance diaphragm and I see the correct one listed as a 283 cu in for GMC series 1000? Didn't think that engine was available, please advise all engines available.

[bigblockv6]

The 305E was the only engine available on US models, Canadian GMC trucks used the 283 that year.

[AZKen]

I have a 305A and 305E and both have the same Vac Advance unit but it does not match what most FLAPS sell. I believe the ones I have are 60-62 and I also believe it is the same for a 283. It has an actuator rod riding in a slot, the one they sent has a flat actuator guided thru a sheet metal bracket. O'Reilly's shows the one I need for a 1963 GMC series 1000 283 motor. I will return the RockAuto and get the O'reilly's. Thank you for the info. RockAuto accepts returns for any reason but will only pay the ship if it's their mistake. I should have looked at the picture more carefully.