CLASS RACER FORUM - View Single Post - Firebird 67-68

Adam Strang · 08-18-2009, 05:20 AM

The Ram Air I came out in `67 and was continued until mid `68 and that`s when the Ram Air II was introduced and that ran until the end of `68. The Ram Air II had the first round port exhaust heads and a .480ish lift cam.

`69 the 400 HO was then called the Ram Air III and the Ram Air IV was introduced.The Ram Air III was still a D port motor with the small lift cam while the IV motor had round port exhaust and tall intake runners.The high lift Ram Air II cam was used again in the Ram Air IV motor but had 1.65 rockers which made the lift somewhere around .520.

The HO moniker was used in `70 for the 455 which was a D port motor and then in `71 and `72 the 455HO had the round port heads with the tall intake runners.

08-18-2009, 05:20 AM	#5
Adam Strang Member Join Date: Dec 2001 Location: Jericho,Vt Posts: 207 Likes: 94 Liked 96 Times in 23 Posts	Re: Firebird 67-68 The Ram Air I came out in `67 and was continued until mid `68 and that`s when the Ram Air II was introduced and that ran until the end of `68. The Ram Air II had the first round port exhaust heads and a .480ish lift cam. `69 the 400 HO was then called the Ram Air III and the Ram Air IV was introduced.The Ram Air III was still a D port motor with the small lift cam while the IV motor had round port exhaust and tall intake runners.The high lift Ram Air II cam was used again in the Ram Air IV motor but had 1.65 rockers which made the lift somewhere around .520. The HO moniker was used in `70 for the 455 which was a D port motor and then in `71 and `72 the 455HO had the round port heads with the tall intake runners. __________________ Adam Strang 1018 STK