Posted By: moparmike1
318 LA to 360 Magnum Swap - 09/27/12 02:15 PM
I have a tired 1972 318 LA in a 72 B-body (originally a 318/904) that I would like to swap out to a late 90s 360 magnum and keep the 904. I’ve searched the tech articles and forum, have found pieces of information regarding such a swap but not a complete run down so I would like to ask about the following and if I have it right.
I’m tried to do this as cost effectively, i.e. cheap, as I can but still being realistic.
Engine Mounts – Schumaker’s conversion mounts are the easiest way to handle this.
Oil Pan – crate version 360 magnum oil pan and one piece gasket.
Camshaft – keeping the stock camshaft but also the mechanical fuel pump so I need the Hughes Engines adaptor, http://www.hughesengines.com/Index/produ...mp;partid=22194
to use the eccentric.
Timing Chain Cover and Accessories – I’m keeping the timing chain cover and accessories from the 318. First to use the mechanical fuel pump and the 360 I’m looking at doesn’t have any accessories.
Intake – Re-drill the magnum heads for an LA 340 intake.
Carb – Small block early 70s Thermoquad.
Kickdown Linkage – Can use stock 4-barrel linkage with the stock intake, TQ and A904.
Exhaust Manifolds – 340 manifolds with Remflex gaskets to take care of the Magnum’s raised ports possibly causing a leak with the manifolds.
Flexplate – Get a 96-02 360 Magnum flexplate since it has the weights already. The 904 torque converter is already neutral balanced.
904 – Stock rebuild, nothing out of the ordinary.
Starter – Stock mini-starter.
Valve Covers – reuse the 318 valve covers to keep the 360 looking stock, period correct, etc.
Thanks in advance for any help,
Mike.
I’m tried to do this as cost effectively, i.e. cheap, as I can but still being realistic.
Engine Mounts – Schumaker’s conversion mounts are the easiest way to handle this.
Oil Pan – crate version 360 magnum oil pan and one piece gasket.
Camshaft – keeping the stock camshaft but also the mechanical fuel pump so I need the Hughes Engines adaptor, http://www.hughesengines.com/Index/produ...mp;partid=22194
to use the eccentric.
Timing Chain Cover and Accessories – I’m keeping the timing chain cover and accessories from the 318. First to use the mechanical fuel pump and the 360 I’m looking at doesn’t have any accessories.
Intake – Re-drill the magnum heads for an LA 340 intake.
Carb – Small block early 70s Thermoquad.
Kickdown Linkage – Can use stock 4-barrel linkage with the stock intake, TQ and A904.
Exhaust Manifolds – 340 manifolds with Remflex gaskets to take care of the Magnum’s raised ports possibly causing a leak with the manifolds.
Flexplate – Get a 96-02 360 Magnum flexplate since it has the weights already. The 904 torque converter is already neutral balanced.
904 – Stock rebuild, nothing out of the ordinary.
Starter – Stock mini-starter.
Valve Covers – reuse the 318 valve covers to keep the 360 looking stock, period correct, etc.
Thanks in advance for any help,
Mike.