[Alex_F]

I am in the process of designing a sheet metal intake for a ohc6 project I am starting to work on. I was wondering what others thought about plenum volume and runner lengths. I have some tubing that is almost the perfect size to match ports. Inside dimensions are 1.875x 1.375 of each runner. Looking at building an intake similar to the below pictures. I have plenty of room to increase plenum size or runner length as needed. Forgot to get pictures of my current design but initially though 1.5 displacement or 375 cubic inches for the 250.

A little project background, I was given a running 6er so I decided to quickly throw it in my 74 which is currently twin turbod, but only going to run one of the s360 turbos on this. Goal is to crank up the boost and see what one of these will do. I considered buying an offy intake for one but cheapest I could find one for was 300 so i decided to make my own. Car will be efi