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Old 02-27-2007, 11:45 AM
pal pal is offline
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setting tunnel ram up questions

i have used the search and read and re-read numerous tunnel ram post. yet i still have some questions. first i will give vehicle info: 68 c-10 pick up, 3700 pounds, 3.73 or 4.10 rear, muncie 4 speed, 406sb, 9.3:1 CR, camel back heads 2.02/1.6 valves some port and bowl work, roller rocker, solid lifter cam (cam specs are being re-thought at this time) cam recommended by cam company -278/286 dur. at seat-108 lobe separation-530/552 gross valve lift-248/256 dur. at .050. not a race, or daily driver. just old school hot rod to drive and raise cain once and awhile.
i have 1984 style weind t-ram
pair 4160 holly 450cfm #9776 carbs, mechanical secondary.
question #1 i want to add center hung bowls for the dual feed look, the big carb look is important to me. will carbs have to be mounted sideways?
question #2 if so, are spacers used?
question #3 do carbs face opposites each other?
question #4&5 if spacers are used, how tall? open or 4 hole?
now linkage, everything i read has me confused. straight keeps a good mixture in the large plenum, progressive is what should be best for street. so what type linkage would work best for my set up? thanks for reading this, and as you can tell i need some help.

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Old 02-27-2007, 12:11 PM
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You will have to mount sideways to use the center hung bowls.

You can mount them both facing the same way OR opposite.
You can get linkage to do it either way. Having the primaries facing the driver's side is the easiest to tune. The one with the opposing operation really looks the best. On the same engine, once adjusted and tuned, it did not really make any difference in performance.

You get an adaptor to set on the manifold and it mounts the carb sideways. Last time I looked they were open hole and about 1/2 inch thick.

You can get angle blocks to cause the carbs to actually sit level.
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Old 02-27-2007, 12:24 PM
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thanks larry. i agree that they would look best opposing, but why harder to tune? is there a differance between adaptor plate and spacers? also where is a good source to purchace these parts? you answere some questions and it seems i ask more. thanks
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Old 02-27-2007, 12:36 PM
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The opposing ones had a couple of extra bell cranks.

Check with your local speed shop(s). They should have a catalog or 2 showing linkages. Mr. Gasket, Moroso, Edelbrock, Holley Weiand all market linkage kits. Check with Jeg's and summit once you get a part number for pricing.
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Old 02-27-2007, 04:48 PM
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have done some searching and cannot find linkage progressive or straight for side mount opposing set up. any ideas on a source? setting the carbs opposite of each other seems like it will take the least amount spacer. if i run them both primarys facing d/s, it would take a big spacer for front carb throttle linkage to clear center of intake.
if i was to run tall spacers, what would the draw back be?
thanks
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