small block 2-4 intakes

As long as the intake is for 67 and up 318's, It'll work on a 340/360 fine. Early 273 engines have a smaller 5/16 attaching screw (Bolt) and they are drilled at a different angle than the later engines. You would have to redrill the intake at a different angle and with a larger hole to use the early intake. Just make sure it's for the later engines.

To bennifit better form the intake, try and port match the intake to the heads as best as possile and as deep as possible. I don't know how much meat is in the runners to do so.

Theres also a low rise and a high rise. The high rise has a taller carb pad. This is what I would be after myself.