Would be interested in this answer myself, as I just rebuilt a 413 in a 61 imperial and have basiaclly the same problme. I am starting to supect the wrong lifters. I put shims under the rockers and that helped. Did not have good compresson. Even changed intake manifolds. Better but still not right. Will run fine for a while then put it in gear and runs rough. Checked the carb gaskets and check for vacumn leaks. At my wits end. New wires plug, gas. Same thing. > > From: "JAY D'ANGELO" <cadij@xxxxxxxxxxx> > Date: 2005/09/17 Sat AM 01:46:04 EDT > To: mailing-list@xxxxxxxxxxxxxxxx > Subject: IML: Engine problems > > Just put a brand new long block 413 in my 64 Imp Convt., but it doesn't idle > properly and is very sluggish off the line. We did a new PS unit, water > pump, radiator, master brake cylinder, coil, points, condenser, cap, wires, > plugs and an Edelbrock 1406. > > We set the plug gap at 35, points at 16 and the dwell dropped to 21. I > hooked up the vacuum advance hose to the driver side port on the carb and > wired the electric choke thru the whatumacacallit on the firewall. > > we set the timing to 10 and got it to idle smooth, then it would get rough > in gear, like it had a vacuum leak. Then we were able to get it falrly > smooth by readjusting the distributor and it roared in park. In gear, it's > smooth but slow off the line and pings. > > My mechanic is tearing his hair out and I'm not too happy, either. > > Any suggestions on this one? > > Jay > > > > > ----------------- http://www.imperialclub.com ----------------- > This message was sent to you by the Imperial Mailing List. Please > reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be > shared with everyone. Private messages (and attachments) for the > Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx > To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm > ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm