3988336 small bl heads
 

3988336 I thought theese were 71 Chev heads don't see them on the NHRA list , am I missing something. ---Trevor

Re: 3988336 small bl heads
 

How about 3986336 or 3986336X or 3986339??????

Re: 3988336 small bl heads
 

3986336 I still don't see them on any NHRA lists. Not a common head ? ---Trevor

Re: 3988336 small bl heads
 

The book I have, Cars & Parts Catalog of Chevy V-8 Casting Numbers is showing the 3986339 as a 69-73 307 C.I.D. Truck head with send(?) hole and with accessory holes in both ends of the head.

Obviously Truck only, so that may be why it doesn't show up in the Guide.

Lew

Re: 3988336 small bl heads
 

339's are in the guide as 71-72 307's. What are your casting dates on your 336's