I have a 69 sb 350 ac car with all the original ac components but the engine is not original and I have a bb I am thinking of putting in. Is there alot to change over to put in the bb? Should I just go with the sb or the bb?
thanks

I'm assuming that you want to keep the factory A/C? If so, you'd better keep the sb. If you change to a bb and want to keep the A/C you'll have to change the Evaporator box. The bb won't fit with the sb evaporator box. I went through that with mine but was lucky enough to find a bb evap box. Now, I don't even have it hooked up so it will come back out next time I pull the motor...I'd keep the sb if I had to do it over again..

why not just get some aluminum and fiberglass and modify the sb evap box to clear the big block? notch it to clear the engine, and build a "dimple" out of aluminum and fiberglass to clear thebig block.
that could be done in a couple of hours.

You will also need to change the tranny crossmember and motor mounts. To keep the AC, a big block air box is a must have. Maybe larger radiator for cooling.

thanks for the info guys I guess I will keep the 350

I'll sell you my BB evap case if you change your mind but it won't be available until this summer. That's when I plan on rebuilding the motor :D

I might be interested in that evap case if he's not.

Hey Angie W., build your small block into a 383 or get a 406 etc. Another option is to switch to a Vintage air etc. and you won't use that box.

I might be interested in that evap case if he's not.


WHEN and IF I take it out this summer I may have to auction it off. I bet I've had 5 people already asking me to sell it to them. Must be a pretty hot item...Rare item...

Well only half of it is being reproduced, which means half is NOT being reproduced, which is really stupid and aggravating to those of us that need a complete one. :mad:

It will DEFINATELY be for sale early this summer, along with the motor I have in my camaro. I'm going with a 502...:D

good luck, a small block to a big block is a lot of bucks,a lot of detail,and a whole lot of frustration. go fast either way with the right set up.