Theres no reason those jets should be different. I would check the jetting
at this site and compare what you have and verify its in the ballpark for the
new motor. I'm assuming the new one is SP as well?
www.gruntled.com/Dellorto
You may also want to rebuild your Dell as it could be a block idle mixture screw
or some other passage clogged with debris. Go to this site for your rebuild needs:
www.dellorto.com
They are in england but ship fairly quickly and can help you if you have questions.
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1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs
Project Fat Nikki Budget 12A rebuild Video setup < $30.00