2012 4.0l Exhaust manifold gaskets and studs

Just installed a 2012 engine into my tacoma. Bought some manifolds from a wreck yard as the newer engines have an air inlet port for some enviroment bs.
Having lots of trouble with finding hardware to bolt these on as the upper studs need to be 2.5 inches or longer and I cannot seem to even find that on rock auto. Photos would be great of someone else's truck to see what is otherwise done. Maybe I just need to install bolt instead of studs.
Also having trouble with the air inlet port. I do not have that system and do not care to install it. Is there a company that sells a block off kit? Having some issue trying to find them

Help would be appreciated thanks

 

Block off plates from Hewitt can be found here: https://hewitt-tech.com/product/block-off-plates-bop/