Made an "un-popular" decision with my 307!

[oldblue1968chevy]

I went edelbrock over weiand and off brand

Id look for a used one untila few days before u gotta have it..just me

[Captainfab]

I have heard elsewhere on this forum, that the Summit intakes are made by Holley/Weiand. That said, I have no idea if they are cast over seas or not.

When looking for a set of the L31 Vortec heads, be sure the last 3 of the casting number is either 062 or 906. Here is a good description of the L31 Vortec heads.

http://www.chevymania.com/tech/vortec.htm

[mud.man.rj]

I would buy the Edelbrock one too, even though it cost more and the Rpm range starts at 1,600 it is proven quality, I'm sure most cams start about the same range, should be nice with Vortec heads. A better chamber size for compression ratio boost too.

[Redleg]

The plan is to stick with an elderbrock. I always like mating intake with carb. So if i have to i will shell out a little extra for it.
But i am going to wait until i am 100% sure on what heads i will be running before i buy.....
As for the heads, he is looking for me. He will more than likely build a set for me to match my cam which is a 270H.

[GASoline71]

My buddy still has those 1.94 heads I offered earlier... for a rediculous low price. Up to you.

Gary

[Redleg]

Originally Posted by GASoline71

My buddy still has those 1.94 heads I offered earlier... for a rediculous low price. Up to you.

Gary

See i was told the 1.94s were way to much for a 307? any truth to that?

[GASoline71]

To be honest... I haven't a clue. The "smallest" Chevy I've ever rebuilt was a 327. Not sure about 1.94's on a 307.

If someone chimes in with info that supports it. Their yours for the low low price of $50 bucks plus shipping.

Gary

[Redleg]

Just got off the phone with the machinest.

Apparently the block i took him was in amazing shape.... To the point that his thoughts that it been machined and never installed. Oh, and its .040 OVER!!!

So, looks like i will have a 307 that is .040 over...which makes it a what???

Anyway, having him hone it, install cam bearings and freeze plugs, grind the crank wash it and prep for paint.

I am also getting a set of ready to go fresh built Vortec heads...All new valves and springs and checked for 325.....

He said he could get me the rebuild kit that has everything for 212....Anyone know a better price for that?????

[sean1969c10]

Sounds like a pretty good price.

[GASoline71]

Thats cool dude! Lookin' forward to hearin' it run.

Gary

[Captainfab]

I don't see any issue with running heads with 1.94 intakes. I've been around a couple 307's that were 'built'......one of them had heads with 2.02 intakes.

[Redleg]

Well we are moving forward. I am getting the parts from him, the machine work and i will be doing the actual build....

Lets hope this goes well!!!!

I am still going to be asking for help....A Lot...

Will be a fun build i hope. Hope it turns into a screamer! Ive decided to do it slow and hopefully when i am complete, i will be swapping motor, tranny and putting in power steering all at once!

[MudBug]

I just ran across this thread.
I got a 69 long wheel base that is all original with a 307 in it. I'm also going to keep the 307 and build it up alittle warmed over.
Short block will be balanced stock with flat tops,Comp marine cam(about a 262),Vortec heads, Edelbrock intake and 500 Edelbrock carb,Hei, and Corvette exhaust manifolds.
I got a 5 speed to put in with a 3.73 rear gear pulling a 275/60 tire
When i was young, the old guys would run the hell out of 307 in b-stock stockcars. 307,doublehump heads,& gm solid cam.

[SSC's76]

My buddy had a 68 chevelle with a 307 pg we ended up putting a set of camel backs on I had laying around with 202's in them also a comp 270H cam. We used a weiand xcellerator with the divider in and a 650 double pumper. Had no problems moving actually idle was great engine ran strong until one day it made a strange noise and half the pistons stop'd moving. I yet to this day see another crank break the way this one did.

[SSC's76]

I found this link a member posted a few years ago might be good reading http://www.superchevy.com/technical/...nce/index.html

[mud.man.rj]

Your engine build sounds well thought out but the carb is a bit on the small side at least come up to a 600-650 and I think it will work better with your other choices on the engine, no sense holding it back especially with those heads it should perform quite well. Use at least a 2.5" exhaust and all should work out great.

[Redleg]

Ive got one question. What would the advantages be of a high rise intake with the vortec heads? Mine will be with my current 600 Edelbrock......

[MudBug]

The 500 Edelbrock is what I have sitting around.This will be a low buck build also.

[mud.man.rj]

Almost any aluminum dual plane intake is better than a stock cast intake and will flow better too, but with this engine it seems a shame to do all the work and choke the power back with to small of a carb, let it breathe and perform especially aster adding great flowing heads with the nice cam. At least use a 600-650 carb or just jet up some.

[Captainfab]

IMO a 600 cfm carb is almost too much for a warmed up 307. A 500 cfm would be a better choice, but since you already have a 600, give it a try.

[Redleg]

I might also post here that my "budget build" has turned into a "far exceeded budget build". The 307 is going to be mean.....But obviously getting some of the work done instead of doing it myself, and having to replace the heads and manifold have driven the cost up considerably!

But i did get to see the cleaned up block, pistons, crank and cam this weekend and man i cant wait to get this thing put together!!!!

So to put it all together, here is what the engine will be

307 bored .040
.040 over flattop pistons
crank journals machined .010
Comp Cam 270H
Headers
Hei distributor
Edelbrock vortec intake
new balanced worked 305 vortec heads
edelbrock 600 carb

Hopefully that lil combo will add up to some decent power. If i can get 325Hp out of this 307 then its more than i could ask for.... From what the shop says he thinks that will be on the low end on what he thinks it will make...

[Redleg]

And i must still say, even though at this point, yes i could have built a 350 for the same price, i do not regret my decision to stick with the 307.

Hopefully once i make the swap i will be able to part out the 307 in my truck and the extra block i have to cover a couple hundred bucks of the cost.

With that money i hope to add power steering and swap out the 3OTT. Want a 5 speed but just cant find one in a good price range so it looks like it will be a TH350 with floor shift so i dont have to buy a new steering column....

[mud.man.rj]

Sounds like the engine is coming together pretty nice, if you go auto trans use a bit of a stall then all your other parts will really come to life, it makes a big difference, say around 2200 stall. Should turn on nice the 305.

[Redleg]

Originally Posted by mud.man.rj

Sounds like the engine is coming together pretty nice, if you go auto trans use a bit of a stall then all your other parts will really come to life, it makes a big difference, say around 2200 stall. Should turn on nice the 305.

Been thinking about that and reading up on other forum threads. Think the 2200 is the best bet?

[mud.man.rj]

I generally use B/M convertors and I think theirs is a 2400 Holeshot the most commom I use for a truck or a car that see's lots of street but not real serious about baggin it just having fun, going much higher then you need a cooler for sure(i usually run a small one anyway, but I am abusive) and then they tend to slip a bit to much when you just want to idle around, good all around choice. Definetily helps with the take off a lot especially on a heavier vehicle like a truck and then fits in well with an RPM intake's and 262/268 cam's sweet spot.