327 275hp rebuild
I've been tinkering around with car projects for many years, but am planning my first complete engine rebuild and am looking for some advice to see if I'm on the right track. This engine will be going into my 67 Camaro.
I just picked up a complete 327 275hp engine that came out of a 67 Caprice. It is mostly stock, but the previous owner upgraded the pistons with something like a 11.2 compression. It has the 462 camel hump heads. I'm thinking to make it more streetable and run regular pump gas, I need to change out the pistons to something with a smaller compression ratio.
When it is done, I would like to have a good balance between impressive street performance and good gas mileage. (Yes I know those are competing factors)
Here's my plan so far: Let me know what you think.
Strip down the motor, take it to the machine shop and have the block and crank checked and possibly rebored or ground as needed. I'm guessing the bore will end up being about .030 oversize. Also have the shop rebuild the heads using stock parts.
Speed Pro H660CP30 Hypereutectic Pistons w/ Moly Rings Kit.
Flat top with valve reliefs
This should give me about a 9.15 compression ratio using my 64cc heads.
What do you think about Moly or Cast Iron Rings?
$200 on Ebay from KMJ Performance.
Using the Cam selector software from Comp Cam, I found a mild cam which they suggest makes good power, while providing good mileage.
It is the Comp Cam 12-205-2 Grind 252H High Energy model. I'm not sure what all the specs mean, but they are easily found by searching this model.
With my existing parts, their software says I should get about:
276 HP @ 4500rpm
376 ftlb @ 3000rpm
This is similar to the factory specs for hp and about 20 ftlb more of torque.
I've got a factory intake manifold model 3872783, which I think came from a mid 60's 300hp 327.
Carb is an Edelbrock 1406 600cfm, which is supposed to provide good performance as well as good mileage.
Exhaust will likely stay factory cast iron manifolds, but I'm open to other GM manifolds available or maybe even consider some small tube headers in the future.
I'm thinking of adding an HEI distributor, but would like any suggestions you have.
When I am done, it will all be painted up to look factory stock for my 67 Camaro, using mostly factory parts.
Feel free to offer me any advice that will help within my basic vision, but mostly to look over my shoulder and let me know if I'm on the right track or need to do some tweaking.
Last edited by rollie715; 04-05-2012 at 11:47 AM.