v8 power

[THA_BAD_ONE-0]

This will be a bit of a long post but i need answers fast!! Thanks
My Truck 91 s10 long bed
350 2 bolt main v8 4bbl
266 crane cam, lifters and pushrods
1974 350 heads
305 intake manifold w/ rochester carb
manifolds with y-pipe one flowmaster
mr gasket inline pump
accel wires and plugs
2 peice drive shaft
700r4 w/ servo and shift kit
4.10 gears one wheel drive(lol)

What should i do becuz it lack in power in my opinion. could it be the intake thats holding back or the exhuast or the carb. and for the street whats the best posi gears i need?

[Sparky2263]

Manifolds and single exhaust would be the first to go if it was mine.

Also, got a pic of the Mr Gasket inline pump? Sounds like an old cheesy "clicker" pump that has a hard time feeding a strong 4 banger, much less a 350.

[Maximus]

That's what I was thinking.Get a decent Holley or even Edelbrock inline pump for Carb's.If your truck still has the intank pump use it but with a good regulator that can bring the fuel pressure down to Carb pressure levels.

[THA_BAD_ONE-0]

Becuz i think i lossing power from some where and it dont seem fast its a 90 350 block with 74 heads

with cam specs
1,600-4,600
duration at 050lift 210int/210exh
advertise dur. 266int/266exh
0.440int/ 0.440exh
lobe seperation 110
0 lash
street
crane cam

with rochester carb and 305 intake manifold.

[Sparky2263]

Tiny cam, but you should still easily be running mid 14's. High 13's if you set up the drivetrain and suspension right.

[THA_BAD_ONE-0]

tell me what you guys would do if the truck was your how would i set up the tryck what suspension, what engine mods and what to the trans. i am only 18 this is my first fast car i want people to remember me at my high school sparky you was my age once

[Sparky2263]

Dump the manifolds and single exhaust! Dammit!

;)

[Maximus]

What Sparky said and get a good flowing intake and a good carb.Throw that Rochester in the trash if power is what your looking for.The heads are probably a drawback to.Get some vortecs and you will see some power improvements.Especially with a good intake,good carb,and good free flowing exhaust.

[T Man]

yup, im with the above. Free up your exhaust, get a decent carb, and some cam

[THA_BAD_ONE-0]

These are the parts i have 305 heads ported and polished, shaved down, new stock valves
3.73 posi unit from camaro
msd box w/ rev limiter
two flowmater 40's, headers shorty
roller tip rockers
elderbrock performer rpm intake high rise

Okay now is there a way i can leave the tiny cam and still reach my goal. I dont wont to go into the block

How hp can i get from this
Elderbrock intake
headers, no cats h-pipe and two flowmasters
holley 650cfm carb
msd box
roller rockers
?????????????????/

people tell me to get the heads off and but on some vortec but my elderbrock wont bolt to those, what could i do for cheap to my 305 heads in order for them to be better than my 350 heads

[KODIAKWARRIOR]

get that engine breathing better, a Edelbrock Performer RPM 500 CFM carb is around 250 bucks. if it were my truck it would have a HEI Ignition system, 12 gallon fuel cell, and electric external fuel pump. those heads dont flow as well as newer heads would,if you were up to it a port polish and 3 way valve job would show some improvement. heres a link to DIY http://www.sa-motorsports.com/diyport.shtm i know how it is to be in high school, im there, graduating in june i brought my ZQ8 to the vocational car show last friday, i couldnt enter the show because i was a day late on my registration, still trailered it there and made my point known. 5 inch side dumps turned a lot of heads and the smell of 112 Cam2 attracted the attention of the automotive teachers, now that was a feeling i havent felt before!

[Maximus]

Well if they are 305 heads they are probably a small chamber style head which will bump up the compresion helping power out some but unless you port them out they are gonna flow like **** depending on what they came off of.TPI 305 heads flow pretty good and can bump the power up with the small combustion chamber they have.I think they are like 58/60cc.They have to be small to make any power from a 305.

[THA_BAD_ONE-0]

well what are 350/350 heads said to hold a 350 to 300 hp i have no clue my uncle said he had some st his yard he is bringing them today i post a pic or a casting number

[Maximus]

Im almost willing to bet they are the old 882 catsings or close.Thoses heads are not worth a dime in my opinion.Im telling for real man for the money you WON"T beat the vortec heads for power and price.Brand new out of the box complete and ready to bolt up is only 500 bucks.But you can buy them used for a lot less than that.They are the best flowing head GM has ever designed to fit on the smallblock.They even out flow and perform the old double hump style heads that were a favorite of racers and street rodders.Even if yoiu have to buy a new intake it WILL be worth it when you have the power your looking for.Almost all of GM's performace crate engines come with vortec heads because they make the most power.Here is a link to their engines.Just look at how many of their engines with 300hp and up have vortec heads.GMPP (http://www.gmgoodwrench.com/perfpartsjsp/partlist.jsp?section=ce&cat=9274)

[THA_BAD_ONE-0]

882 those are the castings on my 74 heads i was trying to remember.

[Maximus]

Those heads are a dime a dozen from the fuel cruch years and they aint worth **** in my opinion with out a hell of a lot of work.Again Vortecs ya can't beat them.Heads to stay away from are casting numbers 185,336,624,and 882's.They are all weak casts and the port designs are awfull.Here is a pic with shapes at the ends of good heads with potential and there casting numbers.
http://www.s10planet.com/forum/attachment.php?attachmentid=2329&stc=1

[THA_BAD_ONE-0]

nos ain't even on my mind how this sound..

Double Humbs with 202 valves (150 bucks) brand new every thing
Edelbrock performer rpm intake
Holley 650 carb
msd box
headers w/ full exhaust

machine shops says with good traction this should be low13's or high 12's depending on how strong the block is.

Is this true or is he spinning my wheel.

[Sparky2263]

machine shops says with good traction this should be low13's or high 12's depending on how strong the block is.

Is this true or is he spinning my wheel.

He's dead on. "With good traction" means exactly that.

[T Man]

dump the double humps. They were good heads for the day, but the vortecs with their smaller valves out flow them any day. Put big valves on the vortecs you are talking about a baaad budget head. Get the correct intake (the ports are diff, so it nees a different intake) and you will be doing well.