HONESTLY.....you've got enough pressure to lube the engine. Start it and see what it has ?

BUT, my engine on a stand has 75lbs with a 3/8 drill. Its an Indy alum block. my lifters are hardlined from the back of the block and are pushrod oiling. I use a HV pump. Don't forget that you created another oil leak with the edm lifters. That's why id fire it and see. Plenty of engines are fine with the oil pressure you have. Also, you can switch to a heaiver weight oil, but id fire it first and see.
Also im assuming you using a steel rod so I don't think it will go down that much when warm.

Sorry, now I see that all these things have been addressed....

Just want to add how good these Melling HV pumps are, ive been using the same one for almost 20 years now...and it was at BES and all they did was clean it and use it again !