ksmitty said:
when I bought this motor it was rear wheel dynoed at 240 hp in a 1970 cutlass S. the car had same gears as mine 373, 350 trans I have 200 4R. I have a 2500 stall he did not. he told me he only let them run it till 5000 rpm and it maxed out on hp after 4100 because of carb was too big and dumping to much fuel in the engine. Not sure if this makes any difference but this is what I was told.So by adding 25% because of drive train loss I figure I am around 300 hp at the flywheel. I would love to get 400 hp at the flywheel but settle for 350. Seeing eddlebrocks build sheet to achieve 397 hp and using cast # 5-7 heads I see its possible. But I was told it takes machine work on those heads to make that happen and basically the machine work turns them into what the aluminum ones are. And the machine work cost the same as the eddy heads. So see its a damn circle jerk. If the machine work didn't cost $1500 or more I would do it. The only two other olds guys I heard of is rocket racing and Keith miller. but why would they give me an honest price on reworking my heads when there pushing the aluminum heads. Know of any other olds engine builders? And If I could run a flat 13 Et I would be happy
Like I mentioned before, I belive after purchasing the edels, you WILL have to get them machined to bring your combustion chamber CCs down to reality to not lose a ton of compression/power by bolting them on out of the box. I wouldnt be supprised if you bolted stock edels on your 350 with 77cc chambers (over your #5s with 64ccs) and made less power! Heres what I mean:
Olds big block head chart
ID/ Use Casting
Code Year(s) CID CCs Number Notes
A '65 400 80 383821 Unique 3/8" stud and nut rocker
425 mounting, using a 3-piece rocker
pivot assembly; all except irrigation
B '65 400 80 383821 Later '65 heads. Some use 3-piece
B '65 425 rocker pivot asssembly.
B '66 400 80 389395 Toro's and 442's got the big [2.072"]
B '66 425 valves. Some use 3-piece rocker pivot
asssembly. "-1" after the casting number
on all B heads after April 21, 1966.
C '67 - '69 425 80 394548 A/C '68
H/O's. Toro's and 442's got big.
455 valves. Rumored to flow the best of all BB
heads. Can still be found.
CA Very small ~3/8" ID lettering.
D* '68 - '69 400 69.75 400370 All W-30. Non A/C '68
H/O's. All '69
H/O's.
All big-valve.
455 69.75 400370
DA
E '68 - '70 455 77,80 403686 455's in general, with 442/Toro's
having big valves.
F* '70 455 80 404438 W-30's. All big-valve units.
G '71 455 80 409100 Generic 455 use, big valves in the
usual applications.
Ga '72 455 80 409100 W-30's, manual 442's used big valves.
H* '71 455 80 409160 W-30's. Big Valve units.
J '73 - '76 455 80,82 411783 All 445's. 'Smog heads',
restrictive exhaust valve pockets.
No big valve units.
K** 455 80 413191
Ka** '73 - '76 455 80 413191 Marine, irrigation, industrial, W-30/Toro,
442 4-speed replacement head. Most were
big valve units.
Olds small block head chart
ID/ Use Casting
Code Year(s) CID CCs Number Notes
1 '64 330 385101 Used ROCKER SHAFTS rather than
pairs on PEDESTALS.
2 '65 330 ?????? All V-8s now using PEDESTALS.
3 '66 330 60 389394
4 '67 330 60 394497
5 '68 - '69 350 64 397742 Excellent candidate for use today.
Good flowing, and high compression.
6 '70 350 64 403859 W-31's had larger 2.000 intakes. '69
W-31's?
7 '71 350 64 409147 W-31's had larger [2.000] valves.
7A '72 350 64 409147 The 'A' is a subscript, like ¼"
tall, to lower right of the '7',
like | 7A.
8 '73 - '76 350 79 411929 Smog heads. Have huge bb-sized 79cc
chambers yielding poor compression
ratios without extremes of
compensation.
10 '76, '77? 260? 57 550362
2A '76 - '81 260 554715 Easy way to ID a 260 engine.
3A '77 - '80 350 75 554716 1/2" bolt holes.
4A '77 - '79 403 83 554717 Matches the 4A or 4B block, get it?
Easy way to ID a 403. 1/2" bolt holes.
5A '80 - '84 307 64 3317
'85 also???
6A '85 - ?? 307 67 5844 Non-ECM Canadian cars?
7A '85 - '90 307 67 0142 This 'A', and the others from 2A to
6A, is a large capital letter equal
in size to, and immediately adjacent
to the 7, like | 7A.
D3A 350 3948 Diesel.
Edelbrock Specs
Cylinder Head Specifications
Combustion chamber volume 77cc
Intake runner volume 188cc
Exhaust runner volume 106cc
Intake valve diameter 2.072"
Exhaust valve diameter 1.68"
Valve stem diameter 11/32"
Valve guides Manganese bronze
Deck thickness 5/8"
Valve spring diameter 1.46"
Valve spring maximum lift .575"
Rocker stud 7/16"
Guideplate Hardended steel
Pushrod diameter 3/8"
Valve angle 18°
Exhaust port location Stock
Spark plug fitment 14mm x 3/4 reach, gasket seat
Made In USA