I bought a 92 RS w/ Iroc Z body kit on it, 5-sp trans. I put it in the shop for some tune up. The mechanic knew chevy's like he knew his mama. He told me he measured and said I have a 5.7li 350. Many people have told me the 350 never came w/ a 5-sp, only automatic. Is there anyhting wrong here. Please Let me know what you think.