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Thanks for the replies and info. Sounds like the concerns are unfounded, and looks like I'll be stroking a 350 to get a couple of extra ponies out of this turd '91 350.

I think this is a matter of debate/controversy. This is from a motorcycle site, but if you thumb through it, there's some interesting explanations of the processes that apply to most engines: http://www.ntnoa.org/enginebreakin.htm Last motor I broke in was on my BMW motorcycle. The...

I'd heard previously that a 383 runs unusually hot and is not well-suited for a crawler with limited airflow. I have googled the hell out of the net to try and find some info to (1) verify this claim and (2) see if there are any remedies. I have found squat that speaks to the 383 having any...

heh -- thanks for the good info anyway.

Have you looked at this one? http://store.summitracing.com/partdetail.asp?part=NAL%2D12530282&autoview=sku Why don't you just rebuild the '97 block? Were you trying to minimize your downtime by having an engine ready to quickly swap in?

Just curious, does it smoke only when going uphill or does it also smoke when going downhill?

wait, are you talkng about using the intake that's on the '93 or using the intake that's currently on your '97? What engine is your '97?

There are several companies selling TBI adapter plates. Trans-Dapt is one that comes to mind and I think Jegs and Summit sell a couple of different brands/styles. I'd heard it's better to use the TBI manifold designed for Vortec heads from GM Performance Parts because it is better at atomizing...

Can you help me understand why that would be? Is it just because of the port opening/flange dimension differences or am I missing something? I thought the Vortecs were superior to earlier GM OEM designs because of their port/chamber geometry -- I thought they supposedly flowed a lot better...

I'm looking at options for rebuilding/replacing the long block assy for a '91 350 w/TBI and swirl-port heads (pickup truck donor). GM offers a crate long-block assy that is a perfect match, but GM intended it to strictly be an OEM replacement and has absolutely no performance gain. I am...

Has anybody used or know anything about these "Vortec" heads from Racing Head Service (RHS)? I was thinking of throwing them on a '91 350 (pickup L05) w/TBI to replace the restrictive swirl-port heads that came on the motor. With these heads, they claim you don't need to change the intake...

I'm looking for someone to rebuild a '91 SBC 350 and also someone to rebuild a TH700R4. I'm looking for someone who is willing to spend a few minutes with me to help sort out questions about how these items should be rebuilt to be better suited to a crawler. For instance, I need a transmission...

I took a welding class run by the Salt Lake School District. It was mostly a quick how-to for a day and then the rest of the days were spent working on projects with help/input form the instructor. If you're looking for advanced, high-quality training, I can't say whether or not this would be...

Great, thanks for the info. That's pretty disappointing. I think I'd better move. Seriously, if there's no recourse/flexibility (even though I'm willing to fork out time and $ to get emissions equipment working properly), then I'll just have to move out of this crap county. Anybody wanna buy...

Thanks to everybody for their input. mbryson, I've heard that Davis County are real sticklers for emissions stuff. Has this been your experience? ( I assume you still live in Woods Cross)

Thanks for the advice. Sounds like if I talk to them ahead of time, they might be able to tell me what I need to do to be compliant. Hopefully they know what they are talking about.

Yeah, thought about that, but... I fear that once you fail, you're on their records as such and thus on the radar. The biggest reason I don't want to try it that way is that I'm bleeding around $7K into this project and a ton of time (my first time doing this so it will take me a lot longer...

Notorious death wobble? Does it feel like it's in the front end and/or steering? Does the steering wheel wobble when this is happening? Is it a rapid wobble or more of a sway? I'm assuming you're feeling a rapid wobble that makes your steering wheel rotate back and forth. I have not had...

Thanks. I think the throttle body on that year had a different provision for vacuum routing, but it might still help me understand the general component layout. I don't think the pickups had Vortec heads until '96, so I think yours has the same swirl-port heads as mine and mechanically, I...

Background: Swapping 1991 GM 350 TBI w/ TH700-R4 into 1990 YJ 4.2l w/ AX-15 & NP231. Must pass Davis County emissions standards. :confused:I know the topic is tired, but I've tried to do my homework before asking for help. From what I've gathered, in order for a vehicle with a transplanted...