I will have to verify casting numbers but I know for sure its a tall deck block. I bought the edelbrock std deck large oval port intake which the ports matched my heads nicely but nowhere near fitting the motor. I would just like a stock intake to fit this thing as its in an old truck and it currently has an edelbrock intake on it but it looks like its for a 366 as the ports are square and smaller than a SBC intake port. I don't know how well these 75 truck heads with large oval ports flow but the hole is twice the size of the intake port it has feeding them now.