import extermination

are there aftermarket heads make for the 350.

cutlassefi

Edelbrock.

J-(Chicago)

Can't run a mechanical fuel pump with e-brokes though, unless you make it happen.

As a bolt on, ABC-123.... I'd say no.

80_cutlass

What is the interference?

sb

J-(Chicago)

The head of the pump hits the side of the head.

OLD SKL 69

Wow, you would have thought they could have fixed that. I guess you cannot grind away some of that aluminum to clear the pump?

citcapp

Because of the lower deck height of the 350. Several people run these with a electric fuel pump. Not sure if its worth it for the gain.

svnt442

One of the guys on another board has a mechanical pump on his 350 with Edelbrock heads, but he did some MAJOR surgery to the head to make it work. He didn't know about the issue and just started grinding on the head and hit the water jacket.

The heads were designed for use on the 400/425/455 and with those it's not an issue, but they will bolt on and work on a 330, 350, 403. It's just the fuel pump becomes an issue and depending on the year of the block so do the head bolt holes.

J-(Chicago)

Jim on here ended up welding and reshaping the entire water jacket.
There was another guy on R.O.P. that machined a spacer, and lengthened the fuel pump arm by cutting and welding it.

507OLDS

I think the Rocket Racing heads have a better clearance in that area,but I prefer the Edelbrocks.You have to use the Rocket Racing intake with their heads,so you only have one intake choice.All of the aftermarket heads will have the larger chambers for a 455,so you would need to mill them down to maintain the same compression.If you are starting from scratch,just put a flat-top piston in it,& less cutting,if any,on the head,depending on what compression you want to achieve.

380 Racer

Everybody complains about the Rocket Racing intake but it seems to work well on my combo. Just use the dyno to figure out spacers.

z11375ss

Yeah, I put them on my small block. Big pain in the ***. 347hp, 388 torque@5100 rpm. You decide. If i had to do it again I would put a 455 in it.

507OLDS

Not saying it's a bad intake.It's just the limitation of choice.

380 Racer

May I ask what problems you had?

captjim

Nick, I think he is referring to e-brocks, IIRC.

380 Racer

OK thanks Jim.

Aceshigh

Definitely NOT worth the money. I looked into them for the sake of keeping my car all Olds.

Tell me this isn't sexy..... 400hp, 16mpg city / close to 28mpg hwy.

Warhead

FWIW, your avatar looks like mine trying to start with half of the plugs wires pulled.
Beautiful car, not sexy to me though.
Jim

import extermination

well i already have the ls1 motor in my trans am ( my daily driver), but to me a olds should stay an olds.
for me its more like, should i continue to build my 350, or should i do like everyone else and build a 455. haha

Aceshigh

Cool , cool.

I just wish there was a MUCH bigger aftermarket for Olds.
But there isn't......and modern technology blows it away for a fraction of
the $$$ some of these guys are charging. The Muscle Car era has been reborn.

I'm taking advantage of the technology in my classics.
But I will ALLLLLWAYS appreciate the big block power legend

380 Racer

If you are going to brag about your ls1, do it somewhere other than an Olds site. I hate to see a perfectly good Olds bastardized with a Chevy engine. Find a friggin Chevelle to put it in!!

507OLDS

If you are still running a SBO,look at a future build with a DX block.Yes,you can go to a 455,but you can build a DX & get sick with it.

import extermination

yeah im kinda on the fence. do i play with my small block or should i make the jump into a big block
right now i have a stock 1977 350 motor with 3A heads and a performer. getting married so im not into spending a ton of money, is it more expensive to stick with the small block and gradually build it?

88 coupe

Unless one has a compelling reason to use .921" lifters, a D block would be a better choice.

Norm

z11375ss

Put a big block in it. I have a small fortune in my small block. It runs great but in retrospect I wish I would have built a 455 instead. In fact I may anyway. I came that close to buying a short block over the winter. I already have all the new parts I need except for the intake.

import extermination

thanks z11375ss ill deffenetly keep that in mind when i start my engine build. i already have a nice 455 core, and i have the 77 350 rocket in my car.

507OLDS

I don't run the .921 lifters.Just have the lifter bores bushed.

pablocutlass

But how much is what must be lowered in the cylinder head edelbrock for a compression ratio of 10: 1 with a flat piston and a cylinder head gasket 4.125 x 0.027 for engine olds 355 or 350 + 030?