imtb Posted March 26, 2009 Report Share Posted March 26, 2009 I am doing a engine swap in my 510 I have an L20B with 1978 Dogleg tranny and the Clutch size is 200MM the new engine is L20B but it was mated up with newer i think 79-81 dogleg with an 225MM clutch. Question is can I use the 225MM clutch and flywheel in the older dogleg transmission. I plan on using the flywheel that on the new engine the one with the 225mm clutch. What throw out breaing should I use? Any help would be appreciated it. I got the old engine pulled and ready to drop the new one in but want to install a new clutch. Quote Link to comment
datzenmike Posted March 26, 2009 Report Share Posted March 26, 2009 Absolutely! The tranny has no say in your choice of flywheel/clutch size. Only the L20B trucks and Z cars used the 225mm flywheel so it's likely off of one of those or the motor is from a truck. If you have the collar that holds the release bearing that was used with the old 225mm clutch, use it. For a bearing, order one for an L20B truck '75-'79. Some clutches come with a collar matched to the clutch, if so use it. Do you know what the motor is originally from? mike Quote Link to comment
imtb Posted March 26, 2009 Author Report Share Posted March 26, 2009 Thank you so much for the quick response. I am going to install the the newer L20B with the 225MM flywheel, Clutch, pressure plate and throw bearing in the older dogleg tranny. Thanks, mike Quote Link to comment
datzenmike Posted March 26, 2009 Report Share Posted March 26, 2009 (edited) If the tranny is out spend $5 and 5 minutes and put a new rear seal in it. Cheap insurance against later drips. Install empty and fill with fresh GL-4 not GL-5. Change every 30K miles. (or oftener) Edited March 26, 2009 by datzenmike Quote Link to comment
imtb Posted March 26, 2009 Author Report Share Posted March 26, 2009 Tranny is still in the car. I still might try and change the fluid. how much does it hold. thanks mike Quote Link to comment
imtb Posted March 27, 2009 Author Report Share Posted March 27, 2009 I decide to go with the 200MM found out it was a roadster clutch and flywheel. It is alot lighter than the 225MM stock 4cyl clutch and flywheel setup and has heavier spring rate. Dropping the newer engine in tonight. Quote Link to comment
datzenmike Posted March 27, 2009 Report Share Posted March 27, 2009 A very good choice! The Roadster clutch requires more pedal effort and may cause the master or slave to leak so be prepared to replace them. Can't really get a better stock clurch. Quote Link to comment
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