i am getting a gm goodwrench350 ci. 260 h/p 350 t. from a friend of a friend.i know its a suck a$$ motor,but its cheap with low miles and a great foundation

i have my 416 heads that are goin on it when i rebuild it. it will stay cc carbed and street driven,never tracked. just car shows and the occaisional ride to work.i like my l69 features with my hood and all so i will want to use that as well. i want it to be emissions legal and retain my egr and ecm. we don't have visual inspections. the car is goin to be tagged classic wich exempts it from the sniffer test,but i still want it to be legal.

i allready have long tube headers and duals. i know not legal,but i like it.

i know the heads have to have 1.94"/1.60" valves in it. they also will be p&p,unshrouded and a 3 or 5 angle valve job.(not shore what i need and what would be over kill. i don't know a whole lot about this stuff when it comes to matching up the parts. so please help me out. it will stay N/A.

i want my comp to be around 9.5:1 to 10.5:1. not affraid to run hightest either. i want flat top pistons and poss a forged crank. i know its important to have all matching parts for the best of the best performance. i want it all to be ballanced too. this is why i need ur help.

so my ? is can u please give me a list of parts and part #'s so i can order the stuff i need. i need a valve train list too. hopefully 1.6 rockers. i don't know if it calls for a roller roker or a non rllr. the block has flat tappets. i'm not sure of the h/p i want,i just know that i want as much as poss without stroking it or being a non street legal set-up. it would be nice to have 350 h/p or more. i would like the rpms to be around 6200.

if i have left anything out i'm sorry,just ask me any ?'s u have. here is the motor. thank u so much for taking the time to help a fellow 3rd genner.

http://www.jegs.com/p/GM+Performance...10002/-1/10763

 

350 HP is easily doable from those heads, flat-top pistons, and a mild cam like an XE268. Save your money and just use the crank you've got, you'll be nowhere needing forged. If you really want to replace the crank, you might as well build a 383.

 

thanks for the quick response bro. how much horse and torq do u thin i can make with this?
do u think a 110 lobe seperation is ok to run with my cpu?
what cc piston should i look into?
i would build a 383 but i don't think it would fit my critieria. i have no problem with keeping the crank. that saves me some money. what do i do about the 1.6 or 1.5 rockers. do i or can i go roller in a non roller block. i don't know much about this aspect of the build.
thanks again for ur help.

 

Your L69 isn't nearly as fussy about vacuum as a fuel injected car, it won't care about the cam too much.

The cc of the piston doesn't matter so much. The important thing is to avoid the cheap rebuilder pistons that'll be another .015" down the hole, killing your compression.

I wouldn't worry about 1.6 rockers, 1.5s would be fine. If you're replacing them, I'd go with roller tips.

You could go with a retrofit roller cam, but then you're looking at spending from $400 to $600 just for a set of lifters alone. Of course there are advantages to roller lifters.

 

ok cool. thanks again for ur help. i should be able to put some parts together and cover my basis.

is there anythingelse ishould do. the motor comes with an edel performer intake. is there a higher flowing one out there? or should i get the edy or have my fact alum one port matched to my heads?

 

If the shortblock is in good shape I would not even change the pistons. The 58cc heads with a .028" thick head gasket will give you decent compression.

 

with the following link wich cam/lifter kit will work. the one i thought would says that it is not cc compatable. this why i asked for P #'s. this **** gets confusing.lol.

http://store.summitracing.com/egnsea...=KeywordSearch

and as for rocker arms what do i want?
http://store.summitracing.com/egnsea...=KeywordSearch

are these the springs i need?

http://store.summitracing.com/partde...=1#Application

which of these pistons will due?

http://store.summitracing.com/egnsea...=KeywordSearch

what push rods and guide plates too? i know i am being a huge PITA, but i love u guys
http://store.summitracing.com/egnsea...4294908216+115

ok. ? for ya. what kind of h/p and torq do u think i can make with doing basically a heads,cam and intake. that is figuring i will be using my 416's done to the hilt and the 268 cam that Apeiron suggested.

i always thought that dished pistons sucked on a N/A motor and since i was goin to be willing to do it,i was going to put in some nice flat tops. but if i can save the money then cool. i just want to get the most emissions legal h/p out this while still being dependable. i should say that the car won't see no more than 5k a year,give or take. just nice sunny days all year long.

 

This kit has nearly everything you'd need to replace the cam, except for the gaskets and pushrods. http://store.summitracing.com/partde...2&autoview=sku Computer-compatibility is for fuel-injection, don't worry about it too much.

If you decide to replace the rockers, a set of Comp Magnum roller-tips, or the equivalent would be good. Not the Pro Magnums, which are full roller. Pro Magnums would work fine but they're more expensive and you don't need them.

No, that's for something entirely different. Springs are included in the K kit above.

Something like these, maybe, but there are dozens of choices for pistons. http://store.summitracing.com/partde...8&autoview=sku You don't necessarily want that exact part number, these are for a .030" overbore.

You don't need to run guide plates. For push rods you should measure with an adjustable pushrod and order the length you need. Chances are it'll be stock.

They do, but you could use the pistons you've got.

 

Dished pistons do suck but when you run a 58cc head and a thinner gasket you can get around 10-1.

 

I'd ditch those heads in favor of a used set of Vortecs which you can pick up for CHEAP!
For under $500 (heads and manifold), you'll save yourself a week's work + ?? $'s on those crappy heads and end up with 50 more hp.
Vortecs, FelPro .015" gaskets, and a super-mild cam will easily get you 350 hp.

 

Apeiron. u are the fvkin MAN!! thanks again.

thanks guys u've helped me out tremendously.

86lg4bird.thanks,but
i am using my 416 heads. no need to buy diff imo.

ok so one last ?. if i do save the money and don't get new pistons. will keeping the dish tops hinder me in my quest for max streetable power. i want to do this right the 1st time. i only want to open up the motor once. if i can 350 h/p,then sweet. but if i can get more by goin with flat tops,then i'll do that. money be damned.

 

oh. and what thickness head gasket should i get if i keep my dished pistons?
do i need a high volume oil pump and a higher capacity oil pan? if so could u please reccomend and oil pump, a pick-up and a pan with a windage tray and baffles.

 

You don't need any of that. A Melling 10553 pump would be fine.