Changing Engine

[jimmye]

I am installing a new SBC in my 1969 GMC, THE QUESTION I know there is just the motor mounts and no rear supports will the mounts hold the engine W/O the transmission, right now I have the engine in place with support under the engine , I am going to put Turbo 400 in next but I need to raise the truck to get the tranny in , I started to put tranny in first , but it likewise has no front supports so I elected to go with engine first and tranny 2nd I can rig up something to support engine if needed. Most everyone wanted me to install engine and tranny at one time but I had accessories on the engine and wanted to do it separate mainly because I am doing it by myself. Suggestions appreciated . I won't go forward till I get some advice from somewhere. Lol