Feb. 13, 2020
 
The NHRA Technical Department recently made changes to the blueprint specifications.
Chev 12-20 COPO Camaro corrected head castings
 
Chev 60-70 added missing intake castings, cylinder head castings and piston type
 
Ford 86 140 145 added specs
 
Ford 87-93 added missing intake castings and throttle body sizes