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If you want to try this I have spare parts
Main air bleed around.042 going up to .0465 should be plenty[ATTACH]
Red is air bleed in hollow screw,White is main system air bleed
8137s came with venturi screw with .063 air bleed .067 is more like what you need[ATTACH]
Slant holley 1945 and 318 bbd had altitude carbs,but not the slant bbd
With todays fuel your already some leaner depending[ATTACH]
solid fuel no main well no air holes below fuel level in bowl. Fuel remains in solid form until well above fuel in bowl
Here link to venturi screws Carter bbd idle circuit - Page 4 - Slant Six Forum One thing todays E10 fuel leans out fixed carbs about 3 percent,...
Well that,s what mopar did in 1977-78 time frame. No jet or metering rod changes ,just change air supply. Different venturi screws and different...
more from mopar[ATTACH]
adjustable venturi top[ATTACH]
some 318,s used this type[ATTACH]
carter service news[ATTACH]
That is carter by number and then application[ATTACH]
From 1978 car manual note the green[ATTACH]
Here is a link about jet flow Question 12 Top 20 Carb Questions Answered (hotrod.com)
carter book ,quite common back in the day
by the dots