Engine Swap Questions

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Mar 13, 2005
Hey all,

Just got a 305 TPI to swap out the tired old carb 350, some questions though, just want some input and opinions, i did a search and nothing conclusive came up.

1) Fuel Line - The TPI systems have high pressure fuel systems. All the yota EFI systems I have worked on have threaded fuel line connections. Is this required? Does anyone use these?

2) What is the best way to tell if this is a good motor? I tried a compression test with just my arm cranking the motor with a breaker bar and got "zero" or "little" deflection on the meter. Also, pulled the water pump and there is alot of rust in the block. Is this a concern? Should I just tear it down and tanked while it is out of the car?

3) I use my truck as a daily driver and the fuel delivery system needs a little help anyway (thanks for the fuel line return and numerous vapor locking threads). Can I upgrade the fuel delivery system with the new lines/pump/filter for the TPI swap and just use a regulator before it hits the carb?

Thanks for your input.
I dont know all the answers but let me tell you this from a past project. (This applies to #2.

If you can and have the time, get the engine checked out. Nothing like doing a swap and going to get it running then hearing a knock or other issue with the engine. Yeah it sucks real bad!!

good luck sorry I cannot help more.
Suggestion to question 2, you can try using a starter and flywheel to turn the engine to get compression readings buy using a remote starter switch.
Starter and flywheel are still on, I will try that this weekend, thanks.

Found this for anyone interested:


Good info, definately need threaded or AN-type fittings for the fuel system. Most aftermarket companies sell them. Sigh, thought I could do this cheap...
Some Pics
1) Just picked up
2) A little teardown
3) Rust
Ran a compression with the starter:
2, 4, 6, 8, 1, 3, 5, 7
10, 10, 50, 60, 5, 5, 160, 160

Added some oil to the cylinders:

10, 10, 50, 60, 5, 5, 160, 160

2 good cylinders! Wahoo!
You could have some burned valves. Also if it hasn't been ran in a long time you might want to do a leak test. That can give you a better idea of the condition of the engine.
Pull the heads and see.
Ran the last test with all the spark plugs out, put all the spark plugs back in:

2, 4, 6, 8, 1, 3, 5, 7
70, 70, 50, 60, 70, 70, 160, 160

Watching the engine valving at work, looks like someone loosened the rockers on cylinders #6 & 8, readjusted all rockers for backlash.

70, 70, 160, 160, 70, 70, 160, 160

Pulled the heads, head gaskets fell apart on both heads in the front. When tipping the engine over, water (disgusting yuck water, dude) poured out of the block. Wonder if the block sat forward so the water ate away the head gaskets?

Gonna clean up the heads.
Time to check the bottem end. Good thing I stopped disassembly to look at the manual.

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