OneStopRestoration's Special Orange 69 Chevelle 300 Deluxe Coupe

[OneStopRestoration]

Nothing to exotic on this build. Speed pro pistons with as large a domes as can be had. Little bit of ring filing and bearing clearance checks on the rod bearings. Cam was put in and checked. Best setup was doing straightup with the timing set. Pistons sat in a hole anywhere from .015 to .025.

Once good with the bottom including oil pump, dropped the pan and tightened everything up.

[OneStopRestoration]

Heads recieved enough decking to get the huge 074 chambers down close to the original 842s. With super thin cometic gaskets and head work compression came in at 10.8 to 11.0 :1 accross the pistons.

Next part gets a bit tougher. With that much machining on the heads this sinks the bolt holes for the intake further downward in the engine. This then means the intake holes no longer line up and you cant put the bolts in.

[OneStopRestoration]

I had to start this project with building a fixture plate to hold the intake on the mill. Not to terribly hard but turned out great. From there the intake can be positioned so that it can then be indicated in to cut the right amount of the material off the intake front to back and from top to bottom of the runners to fit near perfectly on the engine.

Once the mating sides of the intake are cut it re aligns the bolt holes, but now you have the issue of little to now front and back wall clearance. Once again a fixture had to made to hold the intake flat to the table for the front and rear intake walls to be fixed and re machined to match the block.

[Zman1969]

Originally Posted by OneStopRestoration

I had to start this project with building a fixture plate to hold the intake on the mill. Not to terribly hard but turned out great. From there the intake can be positioned so that it can then be indicated in to cut the right amount of the material off the intake front to back and from top to bottom of the runners to fit near perfectly on the engine.

Once the mating sides of the intake are cut it re aligns the bolt holes, but now you have the issue of little to now front and back wall clearance. Once again a fixture had to made to hold the intake flat to the table for the front and rear intake walls to be fixed and re machined to match the block.

I just went through this same deal on my L78 nice work on this car!

[OneStopRestoration]

Im not sure how it goes everyone else but things never go smooth and you really cant trust a single new part you buy.

Had the motor on the stand and it would fire a few cylinders but just wouldnt kick off. changed the coil, check the spark at the plugs which looked weak and then decided to change out the points that had the condesnor intergrated in. Put in one with separate points and condensor. Both sets were AC Delco.

All and all im very happy and frankly impressed with the throttle response and how it runs and sounds.

https://youtu.be/JtRLdeaSxf4

[SMS]

Originally Posted by OneStopRestoration

Im not sure how it goes everyone else but things never go smooth and you really cant trust a single new part you buy.

Had the motor on the stand and it would fire a few cylinders but just wouldnt kick off. changed the coil, check the spark at the plugs which looked weak and then decided to change out the points that had the condesnor intergrated in. Put in one with separate points and condensor. Both sets were AC Delco.

All and all im very happy and frankly impressed with the throttle response and how it runs and sounds.

https://youtu.be/JtRLdeaSxf4

Sweet runner. Thanks!

[Too Many Projects]

The Uni-points were a known piece of crap in the late seventies, at repair shops. But I'm thinking you weren't even born yet to have heard about that...