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Username Post: 350 build        (Topic#349232)
austinm52896 
Forum Newbie
Posts: 5

Reg: 10-22-16
01-19-18 05:48 AM - Post#2721474    

I got a 1982 Chevy suburban with a 307. The 307 is on its last leg and is too small of a motor for the truck to begin with. I got to searching and managed to snag a 350 (86-92 I think) with a 2 bolt main and has been bored 30 over for 200$. The heads it came with are swirl port and the valves are ceased so I'm looking for a good set heads but have no idea what I'm looking for.(it's my fisrturn time building a motor.) I tried to research it but everything I found was about tearing down or building up a 350, nothing about how they work or what to look for. Can someone explain or point me in the right direction?

Thank you



 




Shepherd 
Frequent Contributor
Posts: 1253

Loc: Lake George, NY
Reg: 11-11-15
01-19-18 08:38 AM - Post#2721488    
    In response to austinm52896

First thing you need to know is what kind of pistons are in the engine, flat top, dished? This will determine what heads to use for proper compression ratio. Your other option is to get a long block from, Gm or Blueprint engines, about 1700$, then use all the stuff off your old engine.



Edited by Shepherd on 01-19-18 08:41 AM. Reason for edit: No reason given.

 
0utlaw 
Very Senior Member
Posts: 2789
0utlaw
Loc: US East Coast
Reg: 09-10-02
01-19-18 04:47 PM - Post#2721523    
    In response to austinm52896

In my humble opinion for what it is worth, do not build or buy an engine solely by the horsepower rating. In a heavy vehicle such as yours, you need torque at low rpm. Mild cams build torque. Several manufacturers sell motors 290-325 hp motors to attract the racing crowd...and you might be very disappointed with one of these because of the the missing torque and the rough idle. (A guy in our club bought one and spent the better part of the Summer trying to tame it) I would also shoot for a compression ratio right around 9.1, a heated dual plane manifold, a nice 4 bbl carb and turbo muffler(s). You can then use ignitionman's distributor settings on a stock hei to make a super nice running motor. You do not need fancy heads with big valves and ports or even headers to have a nice running vehicle for cruising.



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17149
grumpyvette
Age: 70
Loc: FLORIDA USA
Reg: 03-16-01
01-21-18 06:32 AM - Post#2721651    
    In response to 0utlaw

start with the basics and that in this case would mean buying a few related books and watching a few videos, heres some useful linked info
don,t ignore the sub-links and it helps to have a knowledgeable mentor , thus joining at least one large local hot rod or corvette club would be to your advantage.
it may seem an over whelming task, but anyone who is willing to read links and ask questions who is not afraid to get his hands greasy,
visit a machine shop and work with and purchase a few hundred dollars worth of tools,
and buy the required replacement parts and correctly install and clearance them, can rebuild an engine.

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...

http://garage.grumpysperformance.com/index.php?thr...




IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 01-21-18 07:20 AM. Reason for edit: No reason given.

 
scrambldcj8 
Senior Member
Posts: 2326

Loc: MA
Reg: 04-06-03
01-25-18 08:06 AM - Post#2722070    
    In response to grumpyvette

In your quest for ideas and knowledge, I would also suggest researching SBC 383 information. As mentioned you're going to want some low rpm Tq to get that heavy brick moving. Hindsight: a 454 would be a nice option, although might be too thirsty for your usage...which is? Diesel swap (6BT) is another viable avenue if fuel efficiency is a concern?



 




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