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small block head guide pins? #1414446 04/04/13 02:17 PM 04/04/13 02:17 PM
Joined: Dec 2009 Posts: 1,023 pa. D dan9 OP super stock
dan9 OP super stock D Joined: Dec 2009 Posts: 1,023 pa.	Hello. Starting to put together a 71 340. I noticed that neither the heads nor the block have guide pins as many other motors do. Did it ever have them or do I need them? I took apart a 318 and it didn't have them either. I thought they would be necessary for alignment. Thanks

Re: small block head guide pins? [Re: dan9] #1414447 04/04/13 02:20 PM 04/04/13 02:20 PM
Joined: Jan 2003 Posts: 75,089 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,089 A Banana Republic near you.	They should be there in the block , if the block was decked the shop didn't replace them. But be careful they are NOT .250 dowels , more like .246 .

Re: small block head guide pins? [Re: JohnRR] #1414448 04/04/13 02:31 PM 04/04/13 02:31 PM
Joined: Dec 2009 Posts: 1,023 pa. D dan9 OP super stock
dan9 OP super stock D Joined: Dec 2009 Posts: 1,023 pa.	Wow thanks. I guess i'll have start looking for a place to get them.

Re: small block head guide pins? [Re: dan9] #1414449 04/04/13 02:32 PM 04/04/13 02:32 PM
Joined: Nov 2004 Posts: 2,495 Oregon City, OR Baxter61 top fuel
Baxter61 top fuel Joined: Nov 2004 Posts: 2,495 Oregon City, OR	Im about 99% positive the SB chevy ones work. I bought a 318 that didnt have them either and I put them in when I put it back together. Pretty sure those are the ones I used.

Re: small block head guide pins? [Re: Baxter61] #1414450 04/04/13 06:15 PM 04/04/13 06:15 PM
Joined: Dec 2009 Posts: 1,023 pa. D dan9 OP super stock
dan9 OP super stock D Joined: Dec 2009 Posts: 1,023 pa.	You are correct. Small block Chevy are the same. The .246 ones are for timing covers. Luckily for me a local engine builder had them. Thanks to all for your help.

Re: small block head guide pins? [Re: dan9] #1414451 04/04/13 07:02 PM 04/04/13 07:02 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Are the .246" ones for timing covers and decks live every 24 hour block of time like it's your last day on earth

Re: small block head guide pins? [Re: RapidRobert] #1414452 04/05/13 02:07 PM 04/05/13 02:07 PM
Joined: Dec 2009 Posts: 1,023 pa. D dan9 OP super stock
dan9 OP super stock D Joined: Dec 2009 Posts: 1,023 pa.	The guy at the engine shop said the .246 ones were for timing covers. I didn't check to see if he was right.

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