FullAuto

If you can spin it 9+k rpm, make over 600hp and run consistent 9s N/A with it, I'll rate it a little higher than an average stock block.

luckythirteen13

i doubt you can go 9k rpms with it but ive seen many 9 second mexican blocked cars.

67mustang302

You can go 9,000rpm on a stock block. Just not for very long, and maybe only once

FivePointOhh

stock vlave train will never let you get there. impossible.

here is 9k revs in the 9's. it is possible but you need new everything
http://www.smithspeed.com/videos/rich981.mpg

306 stock block

67mustang302

Well, I wasn't thinking with stock valvetrain, I meant the bottom end. But yeah, stock valvetrain on a 5.0 only gets like what, 5,500-6,000 before it floats?

FivePointOhh

i doubt even stock bottom end would get you to 9k before you'd throw a rod or something serious of that nature. you NEED lightweight internals to throw revs like that. whether stock can even get there....i cant say for sure.

67mustang302

Yeah, that's why I said it'd prolly only get there once and not for very long It'd be moderately spectacular when it lets go though

FivePointOhh

you make me sick.....who would ever wish that upon their engine???

people that do retarded stuff like that should go to jail for; molestation to perfectly good shlt

Fosters82GT

https://mustangforums.com/m_3022624/...tm.htm#3022624

Complete with pics of a Mexican block.

83gtragtop

That write up by Crazyhorse is very helpful. Just to clear it up in the post it says that "z" and "m" in the ford part number indicates high performance, which is not true. The "Z" indicates that it is a mustang part. The "M" is just an engineering number. Here is a guide to decodingFord parts.

C5ZZ-2140-CR
C - Decade of Manufacture - 1960's in this case
5 - Decade Year - This is a '65
Z - Car line - Mustang
Z - Ford Service Part - This came from the Engineering Department
2140 - Basic part number - 2140 is a master cylinder
CR - Design Change - indicates manual disc brakes

Casting Code Definitions
Decade of Manufacture:
A=1940
B=1950
C=1960
D=1970
E=1980
F=1990
Decade Year:
The digit of the year. A C8 would be 1968, a D1 would be 1971, C3 is a 1963.
Car Line:




Code
Car Line

Code
Car Line

A Galaxie

D Falcon (60-69)

F Outside US, T/A Racing

G Comet/Montego

J Industrial

MMercury

O Fairlane/Torino

P Autolite/Motorcraft

R Rotunda

S Thunderbird

T Truck

V Lincoln (61+)

Z Mustang


Engineering Department:




A Chassis

BBody

EEngine

F Engine Accessories

J Autolite (67-72)

PAuto Transmission

R Manual Transmission

WAxle

X Muscle Parts Program

Y Lincoln/Mercury Service Parts

Z Ford Service Parts



Brian