The drivers side (left) is the challenge. I'm running the oval port RAIV style alum head which is even bigger on the two center ports but even D ports and the mini starter didn't leave much room for the header tubes. The header flanges had to be cut to install one tube at a time. Came out nice but any problem with starter that header must come off. The car has to be fairly high in the air to remove header. Pretty much need car lift. Also was difficult routing steering shaft. Had to use 3 couplers, fabricate special bracket, and make a Teflon bushing in the end of steering shaft. After all said and done I still had to cut off the mounting boss on rear of cylinder head closest to firewall/S shaft. The passenger side is a breeze.