305 heads?
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
I wouldnt do it. There is a gain in compression but the intake ports are generally smaller. Are the heads from a Camaro/TA by any chance? You'd have more luck with porting and installing better hardware on the ones you already have. However, the best choice is to go aftermarket where there are many many choices.
Le Mans Master
Joined: Jul 2004
Posts: 7,163
Likes: 61
From: NH
St. Jude Donor '14
You will have a net loss on running a stock 305 head on a 350. Like the TPI intake (designed for a 305), it will starve the 350.
I would sell the 305 head and buy a nice set of aluminum D-port 113s or an aftermarket set of heads if you want more power.
I would sell the 305 head and buy a nice set of aluminum D-port 113s or an aftermarket set of heads if you want more power.
Race Director
Joined: Dec 2002
Posts: 13,350
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
Safety Car
Joined: Sep 2001
Posts: 4,165
Likes: 555
From: Glenbeulah Wi
I believe the article you are referencing was in car craft and in that article they replaced standard cast iron 350 heads with a set of 305 vortec heads. The 305 vortec heads flowed more air then the standard 350 heads and they had a smaller combustion chamber. In that article the engine picked alot of power (approximately 50 HP).
