70 block

[Mark Lawrence]

I have a gas 70 and the block measures from back to front 10 3/16. Could someone tell me the measurements on an all fuel 70 or tell me where I could go to find out what the actual measurement is?

 

[buickanddeere]

Same length as the later G's.
70 gas and LP blocks have a different bolt pattern than the G or 70 all-fuel blocks.

 

[toomanytoys]

11 17/32 inches

 

[Drew]

I have measured a 7-1 power block, which should be the same length as a styled G block and 70AF block and got 11.557".

 

[jd b puller]

Drew, you sure about that measurement? I'm working on a set of 7" pistons for a guy with a 70 PB and he said it was 10.155" from deck to deck. I've got a couple G PB's in here and they are about 11.5" long.

 

[Drew]

A 70 gas power block would be a 7-2, which a virgin block would be 10.187 long. After it has been decked sometime along its lifetime, 10.155 would be about right. 70 all fuel blocks are longer, the same as a styled G block.

Are the G power blocks that you measured that are "about 11.5" long a tape measure dimension or a micrometer dimension?

 

[jd b puller]

Drew, yeah, the 70 would be a 7-2. Brain's already sleeping.

I just ran out and threw a tape measure on the 7-1's to get 11.5" (note the single place decimal)

 

[Drew]

One decimal point...ahh, yes. Brings back high school and significant figures again.....

 

[Mark Lawrence]

Thamks a lot guys. 11.5 it is.