installing my headers?

[292farmer]

i tried to find what i was looking for with the search option, but couldn't find it.
so here goes, what do i need to install a pair of clifford headers on my 292, with a stock intake. can i reuse all the stock bolts? i havent taken it apart but it looks like i need to change the bolts or swap to studs? i wanted to ask before i took it all apart, and have it lying around in pieces till i find what i need.

i thought i saw someone saw i needed studs 3/8-16 on head side and 3/8-24on intake/header side?
thanks everyone!!