Thread: 355 build help

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You need more info on them Dart iron eagle heads . Sounds Like they have Heavy Roller Camshaft Springs . Yes you don't want them for a Street Engine with a Mild Hyd Camshaft . Is this a 5.7 350 OEM Roller Camshaft Block ? And are you planing to Run a OEM Type Roller Camshaft ? Also them Dart iron eagle heads have a different Bolt Pattern then Your G.M TPI Intake does . You will need to make some Mods to make it fit .

The early TPI's have the same 12 bolt patterns as the Dart heads have.

Originally Posted by 1gary

The early TPI's have the same 12 bolt patterns as the Dart heads have.

Them 1986 TPI Intakes You are Talking about are Very Rare . 1987 on are a different Bolt Pattern . Just a Heads up so you know what your up against .

As for Valve Springs yes they can be changed as needed . But no need to run over Kill on Valve Spring tension even on a Mild Roller Camshaft Build . Look at the Springs used on the Chevy Roller Engines . They are not that Heavy

Originally Posted by tango

Them 1986 TPI Intakes You are Talking about are Very Rare . 1987 on are a different Bolt Pattern . Just a Heads up so you know what your up against .

As for Valve Springs yes they can be changed as needed . But no need to run over Kill on Valve Spring tension even on a Mild Roller Camshaft Build . Look at the Springs used on the Chevy Roller Engines . They are not that Heavy

I tried his link and got a error code so I couldn't see which iron eagle part number he has.I looked at the Dart catalog and found a yr range of a standard intake that ran from 1955 to 1986 with two models having self aligning rockers.Then a year range from 1987 to 1995 that fit those intakes with center bolt valve covers and self aligning rockers.The yr range that he would have a problem would be from 1996 to 1999 that is a vortec intake.Without knowing I would guess he doesn't have either the very early models or the late models mainly because the second one is more common.

Because I am a stubborn old guy,I called Dart and confirmed the 1987 to 1995 heads will bolt on his intake without any mods.Even if he needed to mod the intake,it is a simple matter of oblonging the bolt holes.No big deal.