Need some 350 info

[Dr.Fiero]

I saw a really good write up on the 4.3, with regards to the various years, and what the changes on each one was - sort of a timeline thing.

Is there anything anyones seen like that for the 350's?

If not.... I've got a line on a 1990 TBI engine out of a Suburban. I'm trying to figure out if there were any inherent flaws in that era, and things like the cam - is it a roller in that year? I need to let the guy know if I'm going to take it or not pretty quick.

I'm not overly concerned about the head flow, as I've got plans to put a set of AFR's on it in a year or so.


Thanks!

[TCossuto]

http://en.wikipedia.org/wiki/Chevrol...l-Block_engine

That don't have too much useful information, but its the best I know of. I'd be interested to see something more detailed myself.

[AceHaag]

a 90 should be a roller engine. it was around 88 or so they changed them all over.

[85smallblock]

55'-86' 262-400 sbc are totaly interchangable 100% bearly anyhting was changed other than bore and stroke sizes. but the 85-86 corvette that had aluminum heads were a little different. 85'-86' tuned port injection systems are interchangeabale with all 55'-86' blocks with no mods

87' and up blocks are one piece main seal roller engines with centerbolt valve covers. 92-97 LT1/LT4 engines use a similar block with similar heads but nothing interchanges with the 87-up blocks. the tbi was used from 87-95 in most gm cars and trucks.

in 96' the vortec was introduced. it used a plastic short runner intake. the vortec heads were based on the lt1 port design but can fit on any 55-up block. the gen1 based block vortec was used till 2000 I belive but in 98 the ls based engine was introdued which is 100% new and is totaly different. 4.8,5.3,5.7,6.0 are all ls based engines.

[tippmann243]

Quote: Originally Posted by AceHaag

a 90 should be a roller engine. it was around 88 or so they changed them all over.

BS

cars got roller motors in 87 but trucks got flat tappet motors till 95.

granted they both run a roller block, but trucks dont have a roller cam

[Dr.Fiero]

OK, thanks all - that pretty much sums up what I needed to know.

Oh yeah - IF I wanted to run a roller cam on this block, is it pretty much just swapping the cam and lifters over (and possibly adding the thrust washer) ?

[conn.rod]

Quote: Originally Posted by Dr.Fiero

OK, thanks all - that pretty much sums up what I needed to know.

Oh yeah - IF I wanted to run a roller cam on this block, is it pretty much just swapping the cam and lifters over (and possibly adding the thrust washer) ?

yes you can swap it over.You will need the lifters(of course)If you use stock you will need to get a retainer to hold them in place.There are 3 bosses in the lifter vally that are already threaded for this.GM sells a hot cam I think it is 260 bux or so.You can scavange the lifters and retainers from a junk yard block,305 or 350 are the same,while you are there score the washer and bolts for the cam as well.Save where you can