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#1 |
Registered User
Join Date: Sep 2006
Location: Bellwood, PA
Posts: 123
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My 307 Build Up
I just got finished with a rebuild / mod of my '69 C10 307 motor and I figured I would document what went into and the results here.
Parts List: (prices include shipping) #416 casting 305 heads: 1.84 intake, 1.5 exhaust, 58cc chamber -- $90 Used Edelbrock 1406 Carb (600 CFM) -- $50 Edelbrock RPM Performer 2101 Intake -- $80 Summit Racing Cam SUM-1103 (http://www.summitracing.com/parts/SUM-1103/) -- $55.00 Summit Racing Hydraulic Lifters (16) (http://www.summitracing.com/parts/SUM-HT817/) -- $50 Summit Racing SBC Gasket Set (http://www.summitracing.com/parts/SUM-G2600/) -- $30 Partial total: $355 Additional Parts that I used in the swap that aren't necessarily required: Motor Mounts (http://www.summitracing.com/parts/PIO-A2282/) -- $10 Oil Filter Sandwich Adapter (http://www.summitracing.com/parts/MRG-1272/) --$23 Chrome Steel Fuel Line (http://www.summitracing.com/parts/EDL-8126/) -- $20 Main Bearing Set (http://www.summitracing.com/parts/FEM-4663M/) -- $30 Rod Bearings (http://www.summitracing.com/parts/FEM-2555CP/) (8) -- $30 Timing Chain Set -- $20 HEI Distributor -- $80 Grand Total: $568 Cam specs: Duration at 050 inch Lift 214 int./224 exh. Advertised Duration 272 int./282 exh. Valve Lift with Factory Rocker Arm Ratio 0.442 int./0.465 exh. Lobe Separation (degrees) 112 As built, I calculated the static compression ratio to be 10.5:1 with a dynamic compression ratio of 9.33:1. These numbers may not be 100% accurate, but they should be pretty close. ![]() So far it is running great on 93 octane pump gas. The 307 I was building was using a press fit harmonic balancer with no center crank bolt. While the motor was out I went ahead and drilled / tapped the hole for the crank bolt (7/16 - 20). It made installing the balancer a lot easier than hammering it on or trying to locate a special tool. All of the loaner tools that I could find in chain stores required the tapped crank snout. I removed the fenders, hood, grill, and core support. This made the whole process much easier than it would have been otherwise. I pulled the motor without the tranny attached. Upon re-installation, I found that I needed to jack up the tail of the transmission in order get the motor to go in. I am loving the end result. I do not have any specs yet on actual horsepower or torque, but the seat of the pants results are enough to get 2 thumbs up in my book. It is a huge difference. The edelbrock is a piece of cake to get setup. I will be posting pics and hopefully video as well soon. Last edited by w3lfd; 12-08-2010 at 11:42 AM. |
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