school me on water passage ways

[78Suburban]

My old stock manifold had water passages in the rear of it. The block has water ports in the rear. The edelbrock performer EPS manifold I am about to install has no rear water passages. I had it on my old '66 283 for a long time, which also has water passages in the block. WHY IN THE WORLD does edelbrock not put rear water passages? I have a hard time understanding how the coolant will still flow?

Thanks,
James

PS: there is a bunch of mineral buildup and gunk in the water ports in the block, and a bunch of carbon chunks built up in the exhaust crossover.. yuck that old manifold is HEAVY!!!!

 

[BadBob]

It goes through the block, up into the heads, and forward. It's fine.

 

[78Suburban]

It goes through the block, up into the heads, and forward. It's fine.

Cool. Wonder what inspired Ebrock to make it flow differently than the OEM setup?
thanks,
James

 

[1979jimmy350]

i have seen some of the stock intakes not have a cross over in the rear, it might have somthing to do with keeping the manifold cooler to keep the fuel cooler

 

[78Suburban]

it might have somthing to do with keeping the manifold cooler to keep the fuel cooler

that makes alot of sense really.

Does anyone know how much one of those SOB's weigh's stock? i thought I was gonna bust a gut trying to lift it outta there
thanks,
James

 

[dyeager535]

As mentioned, GM did go back and forth with having a crossover back there over the years.

 

[ntsqd]

I welded bosses onto an intake and brought the coolant fwd to the front crossover. My idea was to see if the engine became less prone to detonation. Those rear cyls get short changed when it comes to cool coolant. It did make a difference.
Were I to do it again I'd do it on the under side of the intake. Those tubes, even though they were stainless, radiated a lot heat and I had to make a HUGE (valve cover to valve cover, full engine length) isolation plate to keep the heat out of the carb.