sbc heads with no acc holes?

[4X4HIGH]

Well since i'm not here to argue with you or anyone else for that matter i'll just let you believe that there weren't accessory holes in 67-69 heads.

Also FYI the mortec site isn't entirely correct either. Just a good starting point for the beginner or less experienced.

 

[BARRAZA]

Well since i'm not here to argue with you or anyone else for that matter i'll just let you believe that there weren't accessory holes in 67-69 heads.

Also FYI the mortec site isn't entirely correct either. Just a good starting point for the beginner or less experienced.

Ha ha, I haven't looked at the mortec site. I was just correcting your error. Everyone's entitled to their own opinion, not their own facts. Believe what you want, just don't mislead others without checking. And I said 67 and 68. Take a look at Colvin's casting number reference, it even has blueprints of some of those, or you could peek in my garage at an original owner 68 ss350 Camaro.

 

[Bent77]

http://www.nhra.com/tech_specs/engine/blueprints/CHEV-67.rtf

On the 2nd page, the 350 for '67 has all of the heads used that year. 186s have bolt holes, 462s don't.

Therefore I call a draw, and get back to the original topic, find other heads or make brackets to use non-acc hole heads w/ accessories.

 

[BARRAZA]

http://www.nhra.com/tech_specs/engine/blueprints/CHEV-67.rtf

On the 2nd page, the 350 for '67 has all of the heads used that year. 186s have bolt holes, 462s don't.

Therefore I call a draw, and get back to the original topic, find other heads or make brackets to use non-acc hole heads w/ accessories.

That NHRA guide lists heads and functional equivalents, and is not an accurate guide of what was made in a particular year. Those heads are by the NHRA's judgement, performance equivalents, with the only differences being the accessory bolt holes and some of the early ones didn't have the temp sending boss. The 186 head wasn't produced until the 69 model year. The 492 head listed wasn't made until 1970, and was available for many years as the over the counter replacement for the early heads. The simple explanation is that heads didn't have accessory bolt holes until the long water pump was introduced in 69. There was no reason for theholes because there had never been anything to attach to the heads. Through 68, A/C's were on the passengerside and used a bracket that attached the exhaust manifold, alternators mounted on the drivers side also using a bracket off the exhaust manifold. PS pumps were mounted low on the drivers side with a bracket mounted to the block in the old front motor mount holes. All the old brackets could be used to put the original posters old heads on his vehicle, but it wouldn't be worth the effort unless he already had those old parts laying around. Especially since he would need a short water pump, different exhaust manifolds, different PS pump.

By the way, the waterpump changeover was done later on corvettes and trucks.

 

[kgblazerfive]

wow good explanation saved me from going in my basement and taking pictures of said heads with no holes from a 350 engine, or googling a picture of a Chevy that fit the fore mentioned explanation

 

[Bent77]

Nhra is correct, mostly. But as you said, they are not always right, and have been challenged more than once, and proven wrong.

I'm not going to argue with you about it either, as it is my only basis for documentation.



I have found out about the long waterpump by trying to order parts for my 72. It still uses a short pump, even though "documentation" says it should be long.

Some things get lost in translation

 

[roadnotca]

Bottom line, even if they are free, they will maybe cost more than getting modern heads.

 

[misterfnygy]

Just dug this one up since I am running these heads on the new motor I am building. I got them for a 327. Anyway- you can use a bracket from a truck with an AIR/smog pump to mount the alternator on the passenger side. PS pump bolts to the block and need to fab up a new bracket for the side that allows you to adjust the tension on the pump.
I will post up picks of the complete setup- should be finished this weekend.

 

[chulisohombre]

summit

i seem to remember summit sold all the brackets for the older engines.i had the 327 w/camelhump heads in my 67 impala(no accessory holes).they are really good heads but the bracket for the alteernator broke and i bought a replacement chrome one from summit.this was 1998 or so,but they may still sell em.