Ironman 4x4 leaf springs. How much lift in my situation?

I have 2016 4x4 Tacoma with about 500 extra pounds in the bed. I currently have 2" blocks in rear. I want to maintain or slightly exceed that exact lift w/o the blocks. Currently my springs are a little negative. Question is, should i get the medium or heavy duty Ironman springs to maintain my same lift? I just don't want my front end to be higher.

I'm open to getting the Heavy duty OMEs also. I don't like squeaking though.

I know this gets asked often, but cant find anything with my exact circumstances. Also ironman or even OME would be fine with me. I'm not willing to pay for Deavers.

Thanks for the help.

 

heavy then take out 1 or 2 leafs i think number 5 and number leafs if there's to omuch rake

 

i also vote for heavy......i have medium duty OME and regret going with mediums. they bottom out very easily every time i go camping with about 500lbs in the back.