This thread makes me wonder if the days of rebuilt engines are over.
Jasper is horrible & I don't have good things to say about ATK or LKQ remans.
GM crate L29's dried up long ago, You might be able to get a short block....GM 454HO part# 19433375, Same short block except for the mechanical fuel pump boss which you will need to block off.
Have your heads rebuilt....Guides, Valves, Springs, Surface. Use OE L29 head gaskets & head bolts....Or you can use ARP bolts. Use Lifter & Retainer kit part# 19540280.
Reuse your camshaft, A OE Timing set, pushrods, & rocker arms would round it out.
x500 for Blueprint engines. Maybe not the cheapest option and they are generally geared more for performance but they do have "stock" style replacements.
Rebuilding is still a good option though. Is your old engine just worn out or was there damage? A bore, hone, cleanup with some new pistons, rings and bearings is still a viable option. Probably your cheapest option but you have to trust your rebuilder.
There are a host of places you can look to buy Chevy crate engines from. When I was still fooling with the Chevelles, GM had several places that offered them in all stages of build. Anything one could possibly need. From single parts to assembled minus the carbs and distributors & belts. One could also go for all the way total assembled with carbs, belts and distributor called the Turn Key crates. I think those are now under the names : Chevy Performance + GM Performance & Bowtie. Bowtie is one that specializes in several years. From older to modern / recent made engines.Will be replacing the 7.4l Vortec in my pickup truck and am exploring options.
My preferred shop likes Jasper, but I've heard hit or miss things about them.
Anyone have any experience with others?
I'm also looking at local rebuilders and other shops that will do the R&R + rebuild in-house.
Get a crate engine
You can get another 454 like you already have, or a modern 5.3 or 6.0 or a bunch of other options![]()
There are a host of places you can look to buy Chevy crate engines from. When I was still fooling with the Chevelles, GM had several places that offered them in all stages of build. Anything one could possibly need. From single parts to assembled minus the carbs and distributors & belts. One could also go for all the way total assembled with carbs, belts and distributor called the Turn Key crates. I think those are now under the names : Chevy Performance + GM Performance & Bowtie. Bowtie is one that specializes in several years. From older to modern / recent made engines.
Blue Print is one of the most popular with the best reputation BUT the highest prices. -----------------------------------------------------
The top 5 rated these days are #1 Blue Print #2 Summit Racing/Street #3 Texas Speed #4 Bowtie and #5 JEG's. Also a place I heard of not too long ago called Speedway Motors if the others are too costly you could check out. Thing is the prices can vary wildly from place to place. There was a really popular one I knew people used that offered even more than those listed above. I will have to look to see if I can find the info on them in my Man Cave. I just recently threw out the last catalog they sent me and the name escapes me right now.![]()
Yes, one really needs to do a lot of checking around to see who is offering what these days. If I had the money I would look to Edelbrock who makes very good quality engines of all sorts and does in fact offer several L29 builds today for fair prices. Actually been kinda shocked by their really good prices right now. They had been know for being more expensive than most not so very long ago.Chevrolet Performance is the only one backed by a manufacturer.
Blueprint started out as a rebuilder, Now they're having blocks, cranks & cylinder heads cast for them. Very popular among the old school muscle car crowd & builds a decent engine. Not sure they would mess with a L29 build?
Texas Speed specializes in LSx/LTx & late Hemi engines. They're bread & butter is selling engine parts but does CNC their own camshafts (Run a TSP cam in my '19 Yukon XL)
Their machine shop/engine assembly isn't designed to take in random stock engine builds.
Summit, Jegs, & Speedway parts/engines are all rebranded.
Did you think about or look into a simple "swap out" with a turn-key crate motor that may cost a bit more up front. But it will have 99.9% of everything new. Also longer? better? warranty than from just a local engine builder?Alrighty, putting this one to bed for now.
1.) There's a well regarded engine builder not far away who will rebuild my engine, gasket match the ports, and use a better cam, for $3500. Obviously they can't give me exact numbers without getting into the engine, so I'll budget $5k+ going that route.
2.) Doing more research and diagnostics, it sounds like I have piston slap, not a rod or main knock. These engines are known for that, the knock goes away when warm(which is when a rod/main knock would get worse), and isn't dependent on oil pressure. Lots of reports of people driving engines in this condition for hundreds of thousands of miles without issue. Obviously not ideal but not instant death either. I drive this truck 2k miles/yr. Seems like I have time to sort this one out.
2.5) Going to try a filter with a better anti drainback valve and see if that helps. Using AC Delco now. Unlikely, but very little to lose.
3.) Probably going to do an 0411 PCM swap, injectors, and tune. Get that ironed out on this old clunker, then have it rebuilt and only have to retune for the porting and new cam on the new engine. Long way in the future.
Fingers crossed.
Did you think about or look into a simple "swap out" with a turn-key crate motor that may cost a bit more up front. But it will have 99.9% of everything new. Also longer? better? warranty than from just a local engine builder?
Seems like that would be the kibosh on any possible nagging issues and most surely the last time you would need repair/rebuilding wrenches in that engine compartment.
I had a Mazda B2200 with same issue. Put it to bed with almost 300k on it.99% of piston slap is harmless... just ask the Jeep 4.0 guys. My old GC with the 4.0 would clatter so bad on cold mornings you would swear it was going to throw a rod out the block, but after a few miles it idled as quiet as a church mouse. That engine had well over 250k miles on it at the time.