'71-'73 saw the option for 304 in FSJs but most chose the 360 instead. The early motors didn't have a crankshaft centering "ridge" around the pilot hole like '72 up did. They used the outer edge of the crank flange and a step in the back of the flywheel with a pilot bearing in the flywheel. If the motor had the TH400 with adapter ring, like my '73 J4000 did, then there is a crank spacer that needs to be removed to access the pilot hole. From: adh@xxxxxxxxxxxxxxxxx (Sandwich Maker) To: amc-list@xxxxxxxxxxxxxxxxx Subject: Re: [AMC-list] 304 manual transmission circa 71 or 72 Message-ID: " From: markprice242 " " If I can see thru the haze in my mind I believe B/W auto trans used a small pilot. " Not much bigger than a bushing in a normal crank. That is for the sixes in the late 60's. " " Now the Buick/AMC/early Rambler/ Jeep engines had a larger hole and a bushing for the turbo 400. and iirc for later amc/jeep, you remove that bushing for a mopar converter. " The question is what did they do with the 304? When did it get stuffed into Jeeps? '73? almost as soon as they took jeep over. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20110830/d78708e0/attachment.htm> _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com