I am curious, did your '63s have a pcv valve in the valve cover on the right side? It seems that the number of hold down bolts and the addition of the alignment tabs occured coincidently with the addition of the positive crankcase ventiliation system. Paul changed In a message dated 10/24/2003 10:00:17 PM Eastern Daylight Time, jsadowski@xxxxxxx writes: > I've owned 4 63's over the years & all had 4 bolt covers. I had a 64 & that >one had 6. > John > ----- Original Message ----- > From: RandalPark@xxxxxxx > To: mailing-list@xxxxxxxxxxxxxxxx > Sent: Friday, October 24, 2003 6:11 AM > Subject: Re: IML: valve cover gasket holes > > > You are probably correct about what was available in all of those years, but >what came from the factory on Imperials was 4 bolt through 1962 and 6 bolt >after that. > > I have several cars from each series and that is the case on each and every >one. none of my cars have had their cylinder heads replaced. > > Paul > > In a message dated 10/23/2003 11:01:29 PM Eastern Daylight Time, >64imper@xxxxxxxxxxxxx writes: > > > > > > > Actually Fel Pro as well as Mopar shop manuals list '59 and early ,60 413 > > engines with a 4 bolt pattern for valve covers. The rest ar the same as all > > the other 60's on big blocks. > > Ray > > ----- Original Message ----- > > From: "mike sutton" <mikanlin62@xxxxxxxxxx> > > To: <mailing-list@xxxxxxxxxxxxxxxx> > > Sent: Thursday, October 23, 2003 9:00 PM > > Subject: Re: IML: valve cover gasket holes > > > > > > > 59-65 Chrysler big block engines ( 361-383-413 ) used the 4 bolt valve > > > cover. The catch to this is that the cylinder heads themselves will > > > physically interchange from any 361-383-400-413-426W- and 440, so intake > > > manifold gasket and port issues not withstanding, any year can have 4 or 6 > > > bolt covers. > > > > > > Mikey > > > 62 Crown Coupe > > > > > > > > > > > > ----------------- 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 > > > > > > > > >