1970 stage 1 block details maybe?

When building a more performance street/strip motor which would be a better core to start with? Any year 455 bare block or a 1970 455 stage 1 bare block and why? Either way i would buying a new rotating assembly so that wouldnt matter. Im just asking for the details on the block like would it be stronger and more capable of handling a little more power and stuff like that, any and all incite is welcome and appreciated

 

A 70 stage 1 block is the same as a 70 non stage 1. Have one sonic tested to verify what you have for any year. Any 70 block will need the oil modification. Post 70 blocks may not require that.

 

Would the oil modification just be to open up oil passages to a bigger size for more oil flow? And so what im getting is that the special stuff about a stage 1 motor are the heads and cam, not the actual block itself. And to have any 455 block that i would choose sonic tested to see what is feasible based on lifter bore thickness and cylinder bore thickness. Or if the block is usable at all based on the sonic test

 

the stage1 parts were the heads.......valves and spring, cam, carb, distributor. as far as I know

 

Okay i see now. for the block itself was the same as any other 455 block then if you took away the heads, cam, crank, rods, pistons, carb, dist, and intake?

 

Yes, and if your planning on making less than 450hp and staying below 5500 rpm which kinda goes hand in hand anyway , any block with basically no mods will be just fine

You wont be buying "a new rotating assembly " as new cranks arent just a phone call away, if your talking about a 470 or 482 assembly then yes look for a healthy block and perform the mods. But for stuff that doesn't see much rpm/abuse the factory stuff is just fine

 

Im trying to drive the car, and take it to the track a few times so i want to make quite a bit of power lol thanks everyone that helps me out quite a bit!

 

All 70 Stage-1 blocks have the big oil passage. Regular 70 did not. 71 block number for most of 71 was the same as a 70 block. Very early 71 blocks did not have the big oil passage. Most of 71 blocks are basically Stage-1 blocks with the big oil passage. From this point on all 455 blocks had the big oil passage. I think starting with block production number 159 in 71 they have big oil passages.

 

So the easier the heads flow the more power is potentially made because the engine is running more efficiently i assumed. In addition to the bigger oil passages. from 70 and later they used the "through the pushrod oiling" right?

 

I like the sound of all of this, what aluminum heads would be best?

 

TA performance. Many different levels.

 

Okay, and would the heads already come with some porting or would i have to ask them about porting options? Sorry guys im very new to the big block buick scene

 

I would probably stay with the se heads this way i dont have to modify the hood. I believe i could use most other stock parts with the stage 2 heads just not the headers right? If i read the ta description of them correctly

 

Would you also be able to polish the bowls, in addition to the porting?