Welcome back Spiderman
There will definitely be some muscle memory going on. In fact, your numbers are still relatively decent for a 3 year layoff. You will likely get stronger quickly on 3x5.
Good choice going with Starting Strength.
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano