Type 1 means Type 1 engines with twin carburettors (IDF/DRLA/KADRON/ICT). These are not appropriate for engines with Porsche style cooling.
Type 4 means Type 4 engines with twin carburettors (IDF/DRLA/ KADRON/ICT). These commands are also used on every Type 1 or Type 4 engine with Porsche cooling. Sold each.model:T1
2187-500Linkage with ball bearing for Type 1 engine - Vintage Speed
2187-700Linkage with ball bearing for Type 4 engine with Porsche cooling...
2188Linkage & Aircleaner kit for straight inlet manifolds IDF & DRLA...
2188-1Linkage and aircleaner kit for offset manifolds, IDF & DRLA
2188-6Crossbar linkage for IDA carburettors
pieces of # in shopping cart.