I have a few questions about 327's I can get a 327 + .030 over (331ci) motor form pan to intake for $650 with 12K miles on rebuild its a 2 bolt out of a 1968 Impala. Do you think 327's are worth investing in? Cause I was running some numbers across Engine Analyzer and there is no difference in power between a 355 with same parts as a 327 except the 327 makes the numbers at higher rpm's. The engine has Stock 1968 heads not sure casting have to call and ask tomorrow Edelbrock Torker II manifold and a unknown cam. I was thinking of getting it finding some cheap heads, a XE274 cam kit the one with everything and some Scorpion roller rockers. Does this sound like it could push maybe 350hp? Depending on head selection? I am only looking for about 350hp.

 

You ain't gettin' 350 hp with stock heads. 2bbl low-end V8 junk.

But, the bottom end should be okay, depending upon what they did to it/put in it when it was rebuilt. I'd want to make very sure about that before I put an XE274 in it.

If you want power, "cheap heads" isn't a very good start. Sportsmans, ported L98's or LG4's, Vortecs (can't believe I said that), etc., would get the job done.

 

Well, before you throw out the stock heads, check if they are double hump heads. If its been apart before, the guy might have put a set of those heads on it. A few double hump numbers are 462 and 186... there are others too, but I know those 2 for sure.

If they are double humps, they might be worth reusing. Only problem, is that they might not have accessory bolt holes if they are 68 and earlier heads.

Just my 0.02

 

They are not double hump heads he told me that much. I was talking to my dad about it tonight seeing what he thought and something kind of shocked me about the motor he went crazy with the orange paint! He covered everything even the valve springs and rocker arms! I am not sure if it makes any difference but why did he paint inside the head? I don’t think I will be getting do to it has no bolt holes for my ac and I am only going on what the guy is telling me the engine as it sits looks well orange but its got the valve covers hanging half way off and paint inside the heads. I probably go back to my original idea of a GM 350 HO crate. I think I will be happier since I get a 3-year warranty and the fact I know everything is brand new. Thanks for the input tho sorry t waste a thread.

 

If the 327 you're looking at has flattop pistons, It could be worth building on. But If you're talking about needing a set of heads then basically what you're getting is a 327 shortblock and at $650, that isn't exactly a great deal.

 

Stock heads out of a 68 Impala won't have the accessory bolt holes that these cars require.

Probably not a good deal, for the application at hand.

The 68 Impala I had, had a 327 4-barrel; but didn't have double-hump heads. I'd expect that the one you're looking at won't either.

 

there are plenty of nice 350's out there to be had. $600 is not a good deal For the headaches you are going to have , getting this motor to "perform" on the street. I know from experience. a lot of fabrication and after market products. Re: Stall converter....3000 at least. then not far behind , a new rear end. What gears you running in the back" At least 3:42's Better 3:72s' 4:11.
Sure they will " perform" Just cost a little more than a 350 for less horse power. And a lot less torque.


Here is a good set up for a 327

 

so much for high rpms's kinda drops off at 6000 with that cam. and a 350 the torque would come on a lot sooner than 5000 rpm. I say let a circle track guy buy the 327...

 

'68 was the start of accesory bolt holes in SBC heads. Is there something they still lack?

Oh, '68 was also the start of large journal and cast crank for 327's. A 350 crank and pistons (cheapest application out there) will turn it into a 350.

 

Camaro and Chevelle 327s got the heads with the bolt holes in 68, maybe Novas too; full-size and trucks did not.

 

Not sure on the other vehicles, but my 68 impala, though large journal, did NOT have accessory holes. Still have the heads in the barn to prove it!

 

I paid $250 for 69 327, i had it built to make it to the 400hp mark, but not on a dinky 2bbl or stock manifold i kept the heads though as they seemed to be worth a deal of cash to the guy who tryed to buy them. i went with hyperuetic pistons and racin valve train comp 10.5:1. large journel block . if i recall my heads only have holes for the basics not including the A.I.R. pump. but the engine is from a 1969 327 SS impala im not sure if they got A/C in that year/make car.

 

I paid $250 for 69 327, i had it built to make it to the 400hp mark, but not on a dinky 2bbl or stock manifold(that had more cracks then a plumber) i kept the heads though as they seemed to be worth a deal of cash to the guy who tryed to buy them. i went with hyperuetic pistons and racin valve train comp 10.5:1. large journel block . if i recall my heads only have holes for the basics not including the A.I.R. pump. but the engine is from a 1969 327 SS impala im not sure if they got A/C in that year/make car.

 

No such thing....

The Impala SS was a big block in 69. Might have been the last year for the SS. The faster small block for that year was the 350, with double-hump heads, with bolt holes; usually 186 castings. Not all 350 4-barrels got th egood heads though; but I don't recall what the difference was (RPOs or whatever).

IIRC 64 was the last year of a small block Impala SS.

The only 69 Impalas with 327s were 2-barrels. The 327 was relegated to econo duties starting that year.

Interestingly enough, there was also a 427 (big block) 2-barrel available that year.

 

I think the first year any normal car got a big block was in '66. The big block (a 396ci) came out in '65, but I'm pretty certain that was only available in the Corvette that year as the 396ci - 425hp. '66 and up is when other cars got the big block IIRC.

Are you sure the Camaro and Chevelle got heads with the bolt holes in '68? I thought the new bracket system that was basically universal on all cars but the 'vette, started in 1969? I could be wrong about that though.

 

My brother had a '66 Impala SS with 275 horse 327, 4-speed. Of course, you know what else they did in those days: 2-bit sized single snorkel air cleaner and single 2" exhaust. Duals with glasspacks did wonders for it.

I had a '70 Impala parts car. It was the 2-door version with rally wheels (have them on the '57 now), and I thought it was called an SS - now you've got me wondering exactly what it was. It didn't have engine/tranny, though, and I don't recall for certain what badge was on the side (did have dual exhaust, which I put on my 400 SBC, so it had to have been a SBC at least). I think it was 350.

I've thought for a long time that '68 was the first year of the accessory bolt holes for all models. The only model in my experience was my grandad's '68 Impala 307 Powerglide, and I honestly don't remember the accessory configuration (although I did get my first ticket in it). We had a '69 Impala 300 horse 350 at the same time, I did a lot more work on it (and took my first driver's test in it).