When did they add the ports for cooling the sparkplugs in the 348 heads?
tx_stratdad Member Mar 21, 2012 #1 When did they add the ports for cooling the sparkplugs in the 348 heads?
P Phil Reed Well Seasoned Member Supporting Member 10 Mar 21, 2012 #2 mid 58 year production. Probably around Jan. 1, 58 is my guess.
oldskydog Well Known Member Supporting Member 10 Mar 22, 2012 #3 For truck engines it started with engine # T-327 (assembly date of March 27th 58) and for the cars, on the Police Cruiser engine (RPO 573) # T-521 (assembled May 21, 58).
For truck engines it started with engine # T-327 (assembly date of March 27th 58) and for the cars, on the Police Cruiser engine (RPO 573) # T-521 (assembled May 21, 58).
