lack of temp

[86c20]

ok so as some know i have been on the hunt for heat in my truck. started with a new rad as it sprung a leak went with the big gas rad 4 core. then it was a a new core as that had a hole from a few years ago. still no heat bad tstat ok fine new tstat still no heat box was not on right. fix that get some not alot. found water pump to be on the way out bad bearing. replace that have lots of flow still not much for temps out the core or motor. put in new 195 after finding that the tstat houseing was only 140 lines to core where 125 and the rad inlet was 120 out was 90. rad cap even at temp is cold to touch. after let truck run for 30 min get heat everything seems hot run down road less the n5 min back to cold. i am at a loss here. also i have 3/4 of the rad blocked off with cardbord to try to get temps up seems to make zero diff in anything at all.