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  #61 (permalink)  
Old 09-08-2013, 11:27 AM
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if you are going to do the spool thing save your $100 and just weld up the spiders.
that way when it comes ungled and it will, you did not waste $100. LOL

I don;t recomend either on the 7.5" rear. Get the aftermarket posi.
The 7.5' rear can be a very reliable rear when done right.

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  #62 (permalink)  
Old 09-08-2013, 11:28 AM
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well see the other thing is, is what if i blow up the engine now im SOL until i pull another one you know but nos maybe an option. if i port the heads and put another cam in it and a new intake will it perform ok?
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Old 09-08-2013, 11:31 AM
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i was also thinking today it would be fun having a strong 305 just saying to people that i have a 305 but it can actually do ok
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Old 09-08-2013, 11:32 AM
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Nitrous is effective but is a pay as you go system and you never eally own the power.
The supercharger makes as much or more power and you own it.
You go fast all the time. The basic engine combination is the same thou
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Old 09-08-2013, 11:34 AM
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ok if i port the heads and get a performer intake, headers, gears, cam would it do ok with those modifications or should i not waste my time and find a vortec 350 and put a RPM intake on it
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Old 09-08-2013, 11:39 AM
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I can show you a naturaly asparated high compression ratio 305 eninge with the ported 4416 heads that makes well over 400hp to. It reves high and needs 4.56 gears and a race converter (8" 9" 4000+ real stall behind a 305). You would need to rebuild the 305 with new domed KB 305 pistons. It has a 10.5;1cr. needs 92++octane gas. Its a bit radical but fully street friendly. but it des need to rev up high. This is the nature of a hot rodded 305.
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Old 09-08-2013, 11:42 AM
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what do i need if i get a new cam?
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Old 09-08-2013, 11:45 AM
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Quote:
Originally Posted by eldudderino View Post
ok if i port the heads and get a performer intake, headers, gears, cam would it do ok with those modifications or should i not waste my time and find a vortec 350 and put a RPM intake on it
It depends. A 350 vortec motor with a cam and the rpm vortec manifold works good too. The vortec heads need a bit of sweetening up to bring it all together.
But the result is good.
whether you can find a L-31 350 vortec motor that is not all worn out or overheated or otherwise fubared
abused is another story. They call them junk yards for a reason. The stuff in there is worn out used up junk. Good vortec motors are either still in service or get rebuilt and put back in the truck. Be ware of what you are buying.
Much of the used stuff is junk.

A LS motor swap is another path. a 454 or 502 BBC fits that car too.

You need a good plan to get a good outcome. You will need more than 1K to play with.
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Old 09-08-2013, 11:47 AM
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a 454 big block? it will fit? well damn hahaha but what would be the best rout a vortec motor or the one i got or trying to hunt down a BBC?
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Old 09-08-2013, 11:54 AM
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Originally Posted by eldudderino View Post
what do i need if i get a new cam?
new lifters maybe be new rockers depending on the valve lift. New high perf valve springs.
Drill and roll pin the rocker studs on the 4416 heads.
shorten valve guide boss/seal for high valve lift.
( or pick a cam with modest valve lift, but the right duration)
new timing chain and gear set.

On a stock low cr 305 your choices are pretty much nitrous or supercharging it.
A N/A combo needs compression ratio (10:1 ish) (flat top or domed 305 pistons depending on the head used.
A high perf 305 needs gears.

What is the gear ratio now? Look on the RPO sticker with all the RPO codes.
for the gear ratio code. or jack it up and spin the wheels and drive shaft and count.

you best choice for a hot rodded high perf 305 or a high perf 350 is 4.10's if you want a quick ElCamino. that eats Mustangs.

you probabily got 2.56:1 gears now.
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Old 09-08-2013, 12:03 PM
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A 454 fits on the stock SBC motor mounts using a 60's 70's BBC 396-454 Chevelle oil pan and 80's Malibu G body BBC "engine swap headers"
or stock 67 to 75 Chevelle exhaust manifolds. dual 2.5" exhaust.
A big Cube motor is a good quick path to power. especily if it is a high perf version.
Other Big blocks fit too. Buick 455 Olds 455 , caddy 472-500.
Use a th 350 or th400 trans
A complete 5.3 liter LS motor (327cid LS) from a newer truck is another way to go. You can supercharge these motors too.
a LS3 from a vette or camaro would be cool.
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  #72 (permalink)  
Old 09-08-2013, 05:18 PM
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Why not commit to anything right now. and wait and see what comes up. A 350 does not need to be a vortec 350. Lots of good ways to hot rod a 350 too. Don;t buy lame hot rod parts thu. small cfm 600-650carbs, performer intake etc.
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  #73 (permalink)  
Old 09-08-2013, 06:06 PM
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As of now,you really don't know what you have to work with.As fas i know,the 305 HO wasn't available in the El Camino,so somebody either switched heads.or,complete motors.If you have the 305 HO,it should have flat top pistons & 9.5:1 CR.If so.a healthier cam & matching valvetrain parts,a good intake,carb,& headers should get you a good runner w/ proper gearing.Just keep in mind tho,that it doesn't cost a penny more to do the same parts,same work,to a 350 w/ better results.As for wether you choose a Vortec,ir is already roller ready & the heads alone are already a 30 to 40 HP headstart.If considering a BBC,or,LS engine,it won't be plug n play.You will need everything especially with an LS swap.
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Old 09-08-2013, 06:16 PM
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If you decide to rod the 305,most of the parts you use will easily transfer to a 350 if you do swap later on for whatever reason.
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Old 09-08-2013, 07:14 PM
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well the guy i bought it from said there was a 350 in it and the block casting number says 305 (14010201) but he had to take the motor out because it isnt the stock intake and you can see where he painted the whole engine chevy orange because there are spots where the paint is flaking off and it is blue and the guy took out the A/C and the windshield washer fluid reservoir i dont know maybe that isnt the block number and is off the heads or something mayeb it is a 350 with 305 heads haha i dont know
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