Yes, the flexplates too. The 290 will swap out with the 343 so long as you keep the 290 balancer and flywheel. The 290 4V was rated at 225hp and the 343 4V was rated at 285hp so they may have used a different version of the T10. IIRC the 343 4V got the M12 auto as did the 390 and the 343 2V got the M11 auto as did the 290, so it would make sense that they used a heavier duty version of the T10 with the 343 4V. Speculation on my part. Compare part numbers on the tranny's. There was also a close ration T10 and a wide ratio so there are many variables, including what was available on the shelf when the car went together. Wayne Wayne & Lisa (Skeezix), Bolton Landing, NY, http://www.superglider.thinkhost.com/ AMO#8454, 83 Eagle Limited Wagon, 82 SX/4, 258 auto 69 Ambo coupe, 401, M12, 66 Ambo 990 Wagon, 327,PW,PB,PS,posi,AM/FM,AC 88 Jeep J10 360, auto- a Real truck 2001 Cherokee, 2000 Chrysler Cirrus (both hers) On Tue, 6 Jun 2006 14:26:50 -0400 "Savage, Pete" <PSavage@xxxxxxxxxxx> writes: > Russ, > > Different flywheels for different reciprocating mass weights, 290 vs > 343... > Aren't all AMC V8s externally balanced on the flywheels? > > Peter > > > -----Original Message----- > From: amc-list-bounces@xxxxxxx [mailto:amc-list-bounces@xxxxxxx]On > Behalf Of russ hathaway > Sent: Tuesday, June 06, 2006 2:06 PM > To: amc-list@xxxxxxxxxxxx > Subject: [AMC-List] 290-4v/4spd question > > I came across the above combo this week-end for $375, > seems complete. It is a 68 combo, out of a Jav. I also > have a 68 343-4v sitting around doing nothing. Is this > a direct bolt on swap?. Is the same tranny and clutch > used with both engines?.....Russ > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > _______________________________________________ > AMC-List mailing list > AMC-List@xxxxxxxxxxxx > http://www.amc-list.com/mailman/listinfo/amc-list > > or go to http://www.amc-list.com > > _______________________________________________ > AMC-List mailing list > AMC-List@xxxxxxxxxxxx > http://www.amc-list.com/mailman/listinfo/amc-list > > or go to http://www.amc-list.com > > _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com