Fresh Cylinder Heads

[Black Robe]

from an '89 LB9 (230 HP) 305 Only 2 hours on 'em...

They were ported and polished and installed on a TPI engine. They make more top end, but the TPI won't breathe enough to allow them to work. They'd be GREAT on a carbureted car instead.

Offers
Abbotsford

[ReEntry Racer]

TTT
Still got 'em...

[zeus1961]

What are the valve sizes, and how much ?

[ReEntry Racer]

Funny you should ask, I don't know but I'll check. These are the heads meant for the LB9 roller cam IROC/T5 combo. I'll confirm the valve sizes shortly...

[ReEntry Racer]

They are 1.840" Intake and 1.500" Exhaust
They have been crack-checked, milled flat, ported, new valves, basically everything done by my EX racing partner who wouldn't listen when I told him to leave them stock. It did improve the max HP, but they caused a torque loss coming out of low speed corners on the tight track at MRP. They would work well on a geared, 3.73 or better, carbed and cammed 305. I don't know how they'd work on a standard 350, or if they even fit. Like I said, offer me something!

[79 Z28]

305 heads dont fit really on 350's chamber size is really small, and the bore diameter is too off.

[89vert]

they fit on a 350, but they won't flow enough and will raise compression way up to around 13:1 or more

[79 Z28]

they fit on a 350, but they won't flow enough and will raise compression way up to around 13:1 or more
that and the chamber size is off, you'll have piston to valve and head issues :'(

[89vert]

they fit on a 350, but they won't flow enough and will raise compression way up to around 13:1 or more
that and the chamber size is off, you'll have piston to valve and head issues :'(

It works though I had a 350 with 305 heads, couldn't drive with my vacuum advance hooked up or it would knock going up hills,