i have a chance to buy a pair of big block chevy motors.they both came out of big honkin dump trucks from the early 70's.guy says they are 366 or 363(hes hard to understand).I was also told by 2 other people that these use the same heads(yes they have the big pipe plug on the back of each head)and crank as a 427.Is this true?im also told its easy to make a stroker??????
beats me i always thought a 396 was the smallest big block...anyways
think i should stuff a built one of those(bored to 427 or 454) into my 86 z?prolly break the windshield cuz of all the torque lol
oh and the casting numbers are
634779 on one and 473478 on the other
ok anybody with info thanks a ton!!!!
mike

[This message has been edited by mikeage2 (edited November 25, 2001).]

 

366's are truck engines, they are in the fleet trucks where i work. they are high tourqe very low RPM engines. i dont think the cranks are the same as a 427, however i do know a 396 has the same crank as a 427(if you ever buy one, ask for the 396 cause some places charge more for the 427)thats all i can help with lil jay

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Wide Open Till You See *** ...Then Brake

89 T/A Clone
406 in progress
TH700R4 3.42 Posi

 

Jay is right... the 366 is a common big block motor in gas-burner trucks. 363 isn't any number that comes in anything stock, big block or small block, any mfr that I know of (not that I know everything that has ever been made).

Crank is the same as a truck 427, yerbasic cast crap. It's not the same as a high-perf 427 crank from something like a late 60s muscle car. It's the same stroke but the similarity ends there.

The block won't bore out to a 427, or even a 396. The bore is WWWWAAAAYYYYY too small for that. The 366, 396, & 427 all have the same stroke (3.75"). Nobody cares what the head casting numbers are, they're truck heads. Complete garbage.

It is a tall block, which is one of those double-edged swords. That means that it has room to be stroked, but it also means that it's about .400" per side harder to fit in one of our cars.

If it were mw, even if I already had a bog-block car and needed a motor and could get one of those for free (I do have such a car BTW, not my Camaro) I'd pass and already have.

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"So many Mustangs, so little time..."
ICON Motorsports

 

well dammit dammit dammit
i thought i finally found something.shiaat
now what am i going to do.i thought my motor quest was over.Iv ehad nothing but bad luck with small blocks then these came up and i thought i had something.********* .anybody know whare theyre are bolt-ons cheap to make a early 70's 350 kick *** ?i mean cheap...im poor and just bougth a house man.this sucks...
thanks for the info an danybody elses 2 cents would be great too
mikey

 

oh and those casting numbers are for the two blocks,not the heads.why are the heads junk?big truck probably means big valves and a half decent comression ratio.
mikey

 

No, it doesn't. The heads are made for low rpm torque and to last a long time. Not performance parts by any stretch of the imagination.

You'll get a lot more power out of a 350, less weight, less hassle, etc., etc., etc.

Save the 366's for hauling dirt.

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57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

well you guys must not have a handy book like my dad does for crossing numbers.Yes one is a 366...the other is a 427!!!!!!!!!!
im sure those heads suck,so no bigie.the 427 is the most promising motor out of the two anyways...you think it would be worth thew effort to build that up and stuck her in my camaro...i know it will take some creative firewall and trans hump mods,reinforcement of the sub frames and a cage to hold the car togther,but im ready to do it if i can make something out of that 427

 

or i could stuff it in out 64 impala ss
hmm )

 

Even though it's a 427 it could still be a truck engine. Look at the casting # book again, if it's a truck engine the above still applies. There are two 427's the normal one and the truck version, the blocks are not interchangable.

 

racers say they prefer the 425 tall block(truck)
the .400 extxa leaves room to put a 4.25"stroke crank in,and that bored to .125 over makes a 490 or some krap...that would rock
i do not pnal on stuffing ti in a thirdgen anymore...too much power lol