engine took a dump, worst case is true!

[fiveoh]

well after a month of getting smoke back up through my air box and valve breather i had the turbo checked, which checked out fine, next i did a compression test, the number 4 cylinder is only gettin 90, i put a little oil in and it shot up to 150 ,which is still 15 lower than any other cylinder, but confirms that i need a new ring and a rebuilt motor! any way im gonna have a guy that built my dads racecar motor in 1976 do the motor, im gonna stay with stock heads and keep the engine as stock as possible, but try to get a bit more out of it, what do you suggest i have him do?
all info aprreciated
thanks
bryan

 

[jwaller]

replace everything! all you need to keep is the crank and maybe the caps.

 

[AXXE]

Stock heads are a waste. At least go to L35s. They will bolt right on.

 

[fiveoh]

are these l35's a stock gm head? if so what car are they from? is htere any intake mods that have to be done like the vortech heads? also what i can look to spend for a rebuild with one of these motors?
anyone else have suggestions?

thanks
bryan

 

[jwaller]

the L35's came on CPI and some TBI 4.3's starting in 93 with the s-10's and everything that got a 4.3. now whats it goin to cost to rebuild a motor. anywhere from 1500-10k. all depends on the durability you want.

a good rebuild will run anywhere from 4-6k.

 

[fiveoh]

i got an estimate on getting my motor rebuilt today, i aske for stock spec lower half and stock heads ported and polished with a 3 angle valve job, total cost is gonna be around 1300 bucks. now im just looking for good accesories to replace all of the old stuff.

 

[dgoodhue]

i got an estimate on getting my motor rebuilt today, i aske for stock spec lower half and stock heads ported and polished with a 3 angle valve job, total cost is gonna be around 1300 bucks. now im just looking for good accesories to replace all of the old stuff.

You don't want a stock spec rebuild! The rods absolutely suck and the piston aren't that far behind. At the very least use L35 rods and forged piston, but personally I would do atleast forged rods and forged pistions (the rebuilt parts alone should total more than $1300) $1300 for porting, rebuild and valve job, sound really cheap, too cheap. If I was a betting man, they are going to use a bargain 4.3 with the wrong pistons.

Buy a set of used L35 heads, you can pick them up at junkyards usually for around $100, don't waste you money porting a lousy head, its going to cost you more than $100 in porting just to get a stock LB4 head to flow as well as a L35 (not that they flow that great, but its better than stock).

 

[fiveoh]

ok, after a bit of thought im gonna prob get the l35 heads and have them ported witht the 3 agle valve job, but what exact cars do they come out of?
also is it worth it to go to a different cam? one that will not have to have the computer reprogramed. the l35 heads need no mods to fit the stock intake correct?
i know these are idiotic questions but id rather sound stupid then waste money :roll: thanks for the input, ill prob have somemore questions also.
all input is welcome as i have open ears