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EFI 58x™ SBC

Whether you are updating your early SBC electronic fuel injection system to use a newer ECU, adding electronic fuel injection to your SBC engine for the first time, or update the ignition system on your carbureted SBC engine, an EFI 58x SBC conversion will equip your SBC engine with the crank and cam signal components necessary to be controlled by popular GM and aftermarket LS-Series compatible ECUs. SBC balancers with a thickness more than 1.325" will not clear timing cover and crank sensor. Balancers designed for 96-newer SBC application may be compatible.

EFI Connection's 58x SBC systems are designed to output the 58x crank signal of a GM Gen IV LS-Series engine. This means that 58x compatible ECUs can now be used on 58x equipped SBC engines! Available with 1x and 4x cam signal solutions.

The differences in the variety of available SBC engines required us to design and manufacture many different 58x SBC conversion kits. Get started by using the conversion matrix below to choose the appropriate 58x SBC conversion for your engine.

PART #	1995-OLDER SBC ENGINE	1996-NEWER SBC ENGINE	SINGLE ROW TIMING SET	DOUBLE ROW TIMING SET	FLAT NOSE CAMSHAFT	STEP NOSE CAMSHAFT	1X CAM SIGNAL	4X CAM SIGNAL	CAM BUTTON REQUIRED
120-00135		X	X			X	X
120-00145	X	X	X		X	X	X
120-00136	X	X	X	X	X	X	X
120-00133	X	X	X	X	X		X		X
120-00137	X	X		X		X	X
120-00141	X	X		X	X		X
120-00134	X	X		X	X		X		X
120-00139	X	X		X		X		X
120-00142	X	X		X	X			X
120-00138	X	X		X	X			X	X

Part #	Description	Price
120-00135	EFI 58x Conversion Kit w/ 1x Cam Sync Distributor for 1996-Newer SBC Vortec Engines w/ Single Row Timing Set	$390.00
120-00145	EFI 58x Conversion Kit w/ 1x Cam Sync Distributor for SBC & 1994-Older 4.3L V6 Engines w/ Single Row Timing Set	$445.00
120-00136	EFI 58x Conversion Kit w/ 1x Cam Sync Distributor w/ Billet Aluminum Timing Cover for SBC & 1994-Older 4.3L V6 Engines w/ Single/Double Row Timing Set	$675.00
120-00133	EFI 58x Conversion Kit w/ 1x Cam Sync Distributor w/ Cam Button in Billet Aluminum Timing Cover for SBC & 1994-Older 4.3L V6 Engines w/ Single/Double Row Timing Set	$780.00
120-00137	EFI 58x Conversion Kit w/ 1x CMP in Timing Cover (Step Nose) for SBC & 1994-Older 4.3L V6 Engines w/ Double Row Timing Set w/ Step Nose Cam	$860.00
120-00141	EFI 58x Conversion Kit w/ 1x CMP in Timing Cover (Flat Nose) for SBC & 1994-Older 4.3L V6 Engines w/ Double Row Timing Set w/ Flat Nose Cam w/o Cam Thrust Button Requirement	$890.00
120-00134	EFI 58x Conversion Kit w/ 1x CMP in Timing Cover (w/ Cam Button) for SBC & 1994-Older 4.3L Engines w/ Double Row Timing Set w/ Cam Thrust Button Requirement	$935.00
120-00139	EFI 58x Conversion Kit w/ 4x CMP in Timing Cover (Step Nose) for SBC Engines w/ Double Row Timing Set w/ Step Nose Cam	$870.00
120-00142	EFI 58x Conversion Kit w/ 4x CMP in Timing Cover (Flat Nose) for SBC Engines w/ Double Row Timing Set w/ Flat Nose Cam w/o Cam Thrust Button Requirement	$890.00
120-00138	EFI 58x Conversion Kit w/ 4x CMP in Timing Cover (w/ Cam Button) for SBC Engines w/ Double Row Timing Set w/ Cam Thrust Button Requirement	$935.00