what do i got

[noho blazen]

just got a new motor today it is a 350 block bored 80 over with a 400 crank and right now i have a tbi 350 in my blazer just woundering how hard it would be to swicht to carb and would i able to use the tbi distibitor,fule pump,coil.tomarrow i get to pick up my tranny t case from the shop th350/205

 

[76zimmer]

80 sounds like a lot, you sure about that? If so, that would be like a 392?

 

[noho blazen]

i am defintly sure it is 80 over that what the top of the piston reads

 

[Beast388]

80 sounds like a lot, you sure about that? If so, that would be like a 392?

392 is correct.

0.080" over is fairly uncommon. That is farther then I would go on an over bore, but if you are using an older heavy-casting block, you might get away with it.

 

[NoReGrEtS]

i heard you can take them .120 over
is that true?

 

[badmix]

I always thought .060 is the limit on a street motor. I wouldnt touch a .080 motor. but thats jus me.

 

[beater_k20]

its probably .030, the stamps often look very similar.

 

[b454rat]

I would double check that stamp, 080 is alot. As long as the cam isn't huge, you can run the TBI. Built a 406 in my old truck and ran like a raped ape, and used stock TBI everything.

 

[Disciples Performance]

.080 would put you into the raw casting/water jackets of the block my friend UNLESS they resleaved the engine with some crazy sleaves

 

[beater_k20]

not necessarily into water. i didnt hit water with the one i sleeved until i got to 4.190.

 

[Disciples Performance]

ya didnt that engine heat up like a mother? thats a HECK of alot of bore to go with thats for sure .... even .060 is alot

 

[76zimmer]

If you can measure the bore (even with dial calipers) it would be like 4.030 (30 over=383) if its 4.080 that would be 80 over 392

 

[noho blazen]

i bought the motor to a machine shop and had the bore mesured and it is 80 over they it would be fine and ? on the a older bloch you just take out the plug that goes into the water jacket for the nock senser

 

[beater_k20]

huh?

 

[noho blazen]

on the block near the oil pan there are sqare head bolt things on each side and on my tbi stock motor it look like the knock sensor goes there

 

[beater_k20]

yeah, that's a block drain on the older engines...

whats that got to do with anything?

 

[noho blazen]

is that where the knock sensor goes

 

[balterbuilt]

i had an engine i bored .090 over and that motor lasted about 4 years (dropped valve took it out on interstate 5).

 

[beater_k20]

yeah... it is...

 

[noho blazen]

thanx