I have a 4779 on a 400, and a demon 825 on a 461. Neither has a choke tower. Both engines start just fine, but require a bit of throttle feathering for a minute or so until the engine develops a bit of heat. Then idles just fine.
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Frank M.
75 Firebird
68 Firebird 400 RAIII
66 Chevy II 461 Pontiac in AZ
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