The cylinder heads are diffrent. Intake from 1998 truck will not bolt up to 1990 heads.
The 2007 Chevrolet Silverado-2500HD has a V8 engine.
The 2014 Chevrolet Silverado-2500HD has a V8 engine.
The 2011 Chevrolet Silverado-3500HD has a V8 engine.
The 2012 Chevrolet Silverado-3500HD has a V8 engine.
The 2006 Chevrolet Silverado-1500 has a V6 engine.
The 2010 Chevrolet Silverado-3500HD has a V8 engine.
The 2011 Chevrolet Silverado-1500 has a V6 engine.
The 2010 Chevrolet Silverado-2500HD has a V8 engine.
The 2011 Chevrolet Silverado-2500HD has a V8 engine.
The 2009 Chevrolet Silverado-3500HD has a V8 engine.
The 2004 Chevrolet Silverado-1500 has a V6 engine.
The 2014 Chevrolet Silverado-3500HD has a V8 engine.