Marine Intake is on and running.

[Roadknee]

That's a pretty cool article. I remember when the vortec heads first became popular a 350 with the Hot cam dual plane high rise, good carb and headers would make an easy 410 HP, just like test 4 in the article you linked.

I agree you're building a monster there. I tuned a 406 SB with Etec 170 heads, a Stealthram and a very mild 219/227 at 0.050" hydraulic roller. Based on lb/hr fuel used and 0.50 bsfc it was making 450 HP. I think your changes will bump the power peak 400-500 rpm and add 40-50 flywheel hp over your current combo. Install 1.6 intake rockers if you can. It will make a difference.

[Fast355]

That's a pretty cool article. I remember when the vortec heads first became popular a 350 with the Hot cam dual plane high rise, good carb and headers would make an easy 410 HP, just like test 4 in the article you linked.

I agree you're building a monster there. I tuned a 406 SB with Etec 170 heads, a Stealthram and a very mild 219/227 at 0.050" hydraulic roller. Based on lb/hr fuel used and 0.50 bsfc it was making 450 HP. I think your changes will bump the power peak 400-500 rpm and add 40-50 flywheel hp over your current combo. Install 1.6 intake rockers if you can. It will make a difference.

One of the first articles I remember on the Vortec heads had to be the one by Hotrod magazine. They literally pulled a junkard 350 from some 70s junker, opened it up, tossed a comp xe268 in it, put 083 tpi heads on it and made 320 hp. They pulled the 083s off and tossed on a set of vortecs. Gained like 55 hp from a head swap. Then they tossed a victor intake and holley on it and came in a touch under 400 hp. It was a dirt cheap~ 400 hp.

[97Z71]

Can anyone give me some info on where to get the marine intake manifold that comes with injectors, fuel rails and the injector harness??Thanks in advance

[1project2many]

They're getting fewer and farther between these days. Watch Ebay and Craigslist, ask around at marinas for boats going to salvage, and just be patient.

There are aftermarket automotive manifolds that will work in many applications.

[97Z71]

I found one in Michigan. But it's just a bare intake. No fuel rails, injectors or harness. That's the main thing I'd like to find is the harness

[Fast355]

I found one in Michigan. But it's just a bare intake. No fuel rails, injectors or harness. That's the main thing I'd like to find is the harness

The Marine harness is not going to help you much if you are swapping over a L31 truck. Its easiest to raid the matching connectors as pigtails in the salvage yard, cut the connector off and solder on the longer pigtails.

[ZQ8 Blazer]

Hey Fast355. Delete some of your pm's. I have one to send you. Thanks.

[Fast355]

Hey Fast355. Delete some of your pm's. I have one to send you. Thanks.

Deleted some old junk, never realized I was out of space.