About to start my bottom end rebuild thoughts and ideas.

[65-coupe]

Well I just bought a 1968 engine with a virgin block. I plan to bore it out to either .020 or .030, 0 deck, flat top forged pistons, to get a CR of 10.5. I might go with a bigger can instead of the 264/264 110 I have not. The 274/274 110 hyd or 278/278 110 solid is what I am thinking. I also am thinking of calling Comp cams and getting a custom cam made to each runner size. I will be building a custom oil pan with baffles and more capacity.

Thoughts and opinions are welcomed

 

[rbohm]

ok, the very first thing you need to do is determine what you want from this engine. are you building a strong street engine, a street/strip engine, etc. once that is determined, then you can start to select parts for the build.

after you have decided what direction you want to take this engine, then start by tearing down the engine, and inspecting all parts that will be reused for damage, and wear. for instance carefully measure the cylinder bores for roundness, taper, and wear. this will help you determine how far you have to bore the cylinders to get them back into proper shape.

you also want to measure each crank journal for the same things as the cylinder bores.

you are going to want the rods rebuilt to get rid of any bending and twisting that is present from years of operation, and i highly recommend that you replace the rod bolts with ARP bolts as they are they best on the market. in fact i recommend replacing the head bolts and main cap bolts as well with ARP bolts.

you want to spend your money in the right places when building any engine, leave the flashy stuff on the shelf for now, and concentrate on building a solid foundation.

 

[bubba22349]

X2 Very good points I will add a couple more, before you disassemble the short block take a few measurements of the #1 front and #6 rear cylinders. Top of cleaned piston and block deck this will give you an idea of how much is needed to get to a zero deck height and also if the block is the same height front to rear. Good luck on the build

 

[65-coupe]

It is going to a be a street engine. I already planned on getting the ARP bolts. I will be having a local machine shop do the work on the short block. He has done alot of engine builds for all the car magazines. He has been around for many years and very respected. I already looked at the bottom end and from I have seen all look to be in great shape. More so what people think for C/R and Cam.

 

[rbohm]

ok for a street engine, for a compression ratio, i try to keep mine around 9.5:1 -10:1 so i can run 87 octane fuel.

for a cam, i recommend running a dual pattern cam that favors the exhaust as you need the exhaust side air flow. so for the street i recommend the 264/274 cam with 110 degree lobe separation angle. this is a good all around cam for a sound street engine.

 

[65-coupe]

Yeah I am really happy with the 264/264 with the Alum head right now. I have no problem running higher octane so I should be fine with 10.1 or 10.5 CR.

 

[wsa111]

With the CI head the exhaust flow is so good i would recommend a single pattern camshaft.
What you need more than anything is more carburation.
Also check my tech article in the small six area concerning distributor gear lubrication with the 1.65 yella-terra rockers.

 

[rbohm]

With the CI head the exhaust flow is so good i would recommend a single pattern camshaft.
What you need more than anything is more carburation.
Also check my tech article in the small six area concerning distributor gear lubrication with the 1.65 yella-terra rockers.

actually i agree with this, i was assuming the OP was going to use the stock log head.

 

[65-coupe]

With the CI head the exhaust flow is so good i would recommend a single pattern camshaft.
What you need more than anything is more carburation.
Also check my tech article in the small six area concerning distributor gear lubrication with the 1.65 yella-terra rockers.

I already did what you told me last year for the distributor gear. I will be getting a bigger carb. I should have listen to you about that before. Learn and move on I guess.

 

[CZLN6]

Howdy back:

I had to add that I'm a real believer in polishing the stock rod beams and to have the engine balanced both statically and dynamically. Other than that, I like the way you think.

Adios, David