Thank you VERY MUCH.We have designed and built a couple of dry sump systems in our shop and an ih wouldn't be that hard to do. But like tom said the $600 and up pumps are what have stopped me, along with the fact that the benefit is not that great.
Tom here is the bbc exhaust gasket on top of the Ih head.
Now that, gentlemen, is a thing of beauty.
So, tell me why this is a bad idea.
I see that the ports match up with the IH ports *exactly on center* (which is better than Stan's, BTW.. he's off a little).
The Chevy ports are larger (duh), but that works to our advantage.
So, two thoughts.
1) bolt Chevy headers up, re-drill, done. That is, if the header was built to allow us to drill the right spots, and if the Chevy headers clear the frame rails (that's the next big issue, BTW)
2) bolt up the IH flange, port match it, and then cut the BBC flange off and replace with IH. If the step is too great, then just weld the IH flange to the BBC flange - heck, in many ways, that's so much easier if you can sacrifice the extra 3/8" since you don't have to weld any thin wall tube.
There is a theory that the exhaust manifold/header should be larger than the port - the "step" acts to help prevent reversion.
I don't know at what point that step gets too big - that rat gasket is a good bit bigger.
In fact, you'd almost have to double up the flanges, since it looks like the gasket might be bigger than the outside dimensions of the port casting in places!
VERY promising, though.
Now to find someone with a stack of BBC headers and see what might fit where.
Y'know, at the worst, I could probably find some big-block tractor-pull headers and run 'em out through the hood.