The OZ (Oranje-Zwart) 350 is a marine variant of the SBC 350 platform. 

Marine engine builders, like Mercruiser and Volvo, use the same SBC platform for many years. 

Our OZ line is a drop-in, marine engine replacement for a 283/305/327 in your Chris Craft.

The OZ 350, is a conventional engine, equipped with a marine carburettor, ignition and  watercooled manifolds. It is completed with a waterpump for raw water,alternator and starter.

With some modifications, you can swap your Hercules flathead platform too for an OZ 350. Ask for more details, when you're ready for it.

The engine torque for the OZ 350 is exceeding your expectations...

The reason to develop this engine, was to find a good replacement for the Chris Craft 283 in my wooden Chris Craft boats. Some of my boats do have a Hercules and other a SBC platform. Although, parts for both platforms were findable, but not always easy to get. When parts become harder to get, their prices go up. The boats I have and most boats I have worked on, their engines were not original anyway. Most of these engines were patched with parts, hat did not the marine job.

The WoodspeeD 350 is a drop in replacement for a 283/305/327, but equipped with CLC (Closed Loop Cooling). CLC is developed not to pickup water for engine cooling. The entire cooling system is a high end cooling system with an electric waterpump and radiator. The radiator has two electronical controlled fans, to keep your engine cool enough. 

The torque for this engine is exceeding your expectations and all parts are still available. This engine is entirely build with new parts. We do not recommend to reuse parts.

New build (2023)

Before, I could start this project, I need to select parts carefully, because some parts need marine certification according to USCG. Also, when parts are not satisfying, I should be able to change them easily. 

Since this application was 100% dedicated for marine purposes, an USCG approval would be very beneficial to retrofit this on older wooden boats. 

I have built several 350's in the past and watched the competition (Mercruiser, Ilmore etc.) for a while. You need to understand, that parts applied should bring you a benefit, not just for show reasons. Another fact is to keep the total price for this setup affordable, so this 350 can be reproduced, over and over.

Goal & Requirements

• SBC platform,
• around $5K of parts,
• a cast-iron foundation (Block, Heads, Crankshaft), 
• modern, high performance parts,
• achieve low fuel consumption, 
• electronic control; engine temperature, fuel & ignition, 
• no water pick-up, 
• pump gas compliant, 
• high torque at low RPM, 
• plug and play wire harness,
• one display for monitoring,
• low maintenance,
• eaasy install platform in any older wooden speedboat and/or cruiser,
• manageable device EFI & EI for different boats
• reliable platform.

New build (2023)

With the experience of the 350 CnE, I started this project for more torque at lower RPM. Also, I needed more USCG certified parts. 

Since this application is 100% dedicated for marine purposes, an USCG approval would be very beneficial to retrofit this in older wooden boats. 

I have built several 350's in the past and watched the competition (Mercruiser, Ilmore etc.) for a while.

Fact is to keep the total price for this setup affordable, so this 383 can be reproduced, over and over.

Goal & Requirements

• SBC platform,
• around $7K of parts,
• a cast-iron foundation (Block, Heads, Crankshaft), 
• modern, high performance parts,
• achieve low fuel consumption, 
• electronic control for engine temperature, fuel & ignition, 
• no water pick-up, 
• pump gas compliant, 
• high torque at low RPM, 
• plug and play wire harness,
• with main display for monitoring,
• low maintenance,
• easy install platform in any older wooden speedboat and/or cruiser,
• manageable device EFI & EI for different boats reliable platform.