I know its not Y-Block specific, but we have some bird-folks here.  Anybody search/find a source for upgraded suspension parts (thinking alternate to stock rubber bushings) for the small birds? 
I've found some sway bar offerings, firmer shocks, and progressive springs... but looking for bushing improvements and wishing to avoid those made from unobtainium.
Cheers... Brian          
			    
				
			    Cylinder Index = 84
Current Experiment = `57 Tbird, Grand Rapids, Michigan