The truck I'm working on belonged to my Dad. He did a lot of mods over the years and I wasn't involved in all of them. He swapped the 2.4 out for a 2.6 b/c he use to race 2.6L Sapporo's in modified mini class dirt track racing. He parked the truck inside around 2011 and sold the cylinder head to a young kid who had been bugging him for it. It had valve and port work along with a dirt track racing grind on the camshaft. I bought a new non jet valve head with a stock cam to button it back up. Rebuildin the fuel system and weber at the moment. Truck has a long tube header and custom exhaust also. I'm not sure where he got the motor but I guess it could be a Starquest engine. Outside of pulling the oil pan I'm not sure.