rough idle in gear
Got the '71 455 in and running.('66 Lemans). Finally got crossmember mounts in and welded. Can finally drive her. The fool thing starts and runs great in park, EXCEPT when you put it in drive, it idles like a POS! Also, when in park, if you punch it to WOT, it'll either pop and stall, OR, it will catch and sound like a damned racecar! I've changed the bloody accelerator pump twice. Shooting a GOOD stream in there. Running a Carter 9635sa competition carb.(625 cfm, I know a little under sized, but PO had a 600 cfm on it and it run great). Rebuilt carb (twice). Running a Mallory Unilite ignition. New wires, etc... Plugs gapped at .045. Even going to half throttle, she burns rubber. Drive it normally, and it's fantastic. if you lift it just above idle, then stomp on it, clear the road-it's gone! Just that #^@>%&# crap idle in gear, and that stinking WOT bs that has me about ripping my hair out! Could it be that stankin' Chinese knock off of a Carter, or is it just me? ( I've had Carters on my '56 New Yorker, '63 Cadillac, etc... 17mpg & 24mpg respectively,and all the power at your disposal-NEVER had any problems like this). 30 over pistons. 4x heads. Edelbrock Performer Pontiac intake.New timing chain & gears. New upper gaskets, etc...rest is stock. Also, going up the road, I had light valve clatter under moderate load.(went away when I disconnected pcv & plugged it). I am about at the end of my rope with this thing. Any assistance rendered would be greatly appreciated. Thanks.