ou sure those manifold were form rare c10 ss 396 or ultra rare 2 ton ss 396 straight truck? too many people think if its a four bolt 350 its a vette motor had lots of people try it with 327s too 1 guy tried it with a 60s block wanted 300 so i called a friend at dealer he ran numbers came back as the low hp out of a belair never seen a guy turn so red top it all off the car was in back be hind hey pile was a 4dr at that