Modifying an intake, tall deck to short deck

I agree it is a little much for cutting to fit a 10.3 block....



Randy

As the other guys are telling you, if you took that much off the flanges, it's too much and your runner roof will be way higher than you port roof.

Another option would be to split it down the center, from front to rear. Your manifold bottom becomes narrower, so you will have to deal with that issue. Next, you could probably line up on the ports with your runners, however your plenum will become much narrower, along with your carb pad being narrower.

Sop, at the end of the day, it may be best to just sell it and start with a clean sheet of paper.

I am assuming that it is a sheet metal tunnel ram style of manifold,,,,what heads was it being used on???

Uncle Charlie

is this a sheetmetal intake, if so the above is the only way,cut it down the middle, it works, i did it 3 years ago, and i just cut it again to go back to a 11.2,lol lot of work

you may wish to check the runners, on most of the injection intake the runner are strait, not so good on an engine you intend to carb, the runners should have a slight taper down to the ports..... sometimes what works on one won't on another........


Randy