is ti possable that starter draws to much power and makes car hard to start?

Starters draw based on the load. It's not the starter inherently. Off the motor the starter would use almost no amps to turn. Trying to start a motor they use upwards of 250 amps.

Sounds to me like a timing problem as well. Adjust it until it starts easier.

There seem to be three batteries in bad shape..

Maybe if you get the cranking RPM up, timing won't be such an issue.

A big 351 block needs a new bad *** battery and new battery cables.

Car batteries never fully recover from being dead.

After a few times dead and/or spending time on a concrete floor, (which causes the top and bottom to be at two temperatures, and two different voltages) a car battery is ruined.

Get a full size spec for the car high cranking amps new battery.

Clean the insides of the clamps with sandpaper.

Consider new battery cables. They probably have some resistance to current.

It only takes half a tenth of an ohm to limit the flow.

Sounds like the engine timing might be off a little and you may need more cranking amps to get it turning over faster to start off with ,

if you had a damaged or high compression engine the starter could pull a great deal of power from the battery.