low oil psi after recent inframe/ excessive blow by

I have a 99 classic w 05 crate engine.. it recently had inframe done. But I've noticed great deal 9 oil consumption and blow by like freight train... ?? Oil psi is under 40 running down hwy 3 days after svc was done... can anyone help??? 60 series detroit. Shop was recommended by company I run for. And purchase ing trk thru..

 

Sorry bout that new this site

 

I kinda new that something was wrong . But I went off just info I was given but I'm too far into paying for just too give back now.

 

just had a year cause the owner tell me the word you just got to run out. the shop give thems.one year or 100,000 miles

 

and ongoing problem I took i tot his shop for him to check it out. We found a crack in the air to air. I replaced it !then be considered oil cooler may have a blockage. be done so Friday replaced it.
first run out with it since the old crew is buddy. I have had enough time to tell if it's going to be use any. but the blow by still unreal.mI pick the truck up in April and it had blow by then I wasn't sure if that was right or wrong? that time frame was only 6 months old