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Here are a couple engine builders that build engines specifically for TBI that perform well, quality built for good reliability and reasonably priced..

Herb builds a 320hp 360lbs of torque black magic project engine clone except stock vortec heads where I ported mine but he can do that as well. He also does a really nice 383 version as well for some serious 4x4 or towing torque.  hlgper@comcast.net or (281) 546-6232 Located out in TX

Also, check out the LKN Speed project under customers projects.  They built this engine specifically to run with TBI and have some good dyno numbers even using stock throttle body.  Should make really good numbers with a larger throttle body. (704) 363-8709 Located in NC.

I put the location so if your eastern US you might want to talk with LKN and west coast for Herb.  Neither of these shops pays me anything so if anybody has any issues with either let me know.  So far I haven't received any complaints about either and I do a lot of PCM programming for OBD2 stuff for Herb and I let LKN fix my 383ci LT1 after its disaster on the dyno.  he didn't build the first motor for the LT1 but he fixed it back up for me and was very thorough and professional.  He also has a very nice facility with a lot of specialty equipment and my LT1 runs really strong and has a good 12k miles on it now with no issues.

Looking for gas mileage improving modifications.  Nothing will improve the gas mileage as much as having the motor in good tune with fresh plug wires, plugs, distributor cap and rotor button.  In fact a new MSD Blaster coil MSD-8226  will help throw a hotter spark across those spark plugs for a more complete burn of the fuel your using and thus better gas mileage. Also, I find that the stock AC Delco plugs gapped at .040" works better than anything.  A combination of all should give you respectable gas mileage from your vehicle which is very important these days.  You should also consider ASP under drive pulleys as turning the accessories slower frees up HP which uses less gas.  Good exhaust and air intake will help as well and lastly 5w-30 motor oil. Unless your motor leaks oil like no tomorrow use the factory recommended 5W-30 oil as the lighter oil is going to have less drag on the motor which may not sound like much but every hp we free up without internal modifications to the motor is FREE hp (which means it didn't cost us any more fuel to make) and goes straight on down to the wheels which is the purpose of HP.

This page is a list of modifications for the DIY crowd that I have used with success on the TBI equipped vehicles.  I do not make any money by recommending these products but I would like to share this info to help others not make the same mistakes that I did modifying my first few TBI engines.

[CARS] ,  [Small block V8TRUCKS], [4.3L V6 TRUCKS] and the [454SS]

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