Hi All
Update on my 253 Build started with a $500 special
Rebuilt on the .030” spec
207/213 @050 mild street cam
HEI
Did my own head work
Posted 18 September 2025 - 12:54 PM
Hi All
Update on my 253 Build started with a $500 special
Rebuilt on the .030” spec
207/213 @050 mild street cam
HEI
Did my own head work
Posted 18 September 2025 - 12:58 PM
Wow, the before photo is filthy!
Looks terrific now, great effort
Posted 18 September 2025 - 01:00 PM
Built a 4 speed v8 box from a 6cyl with a few new bits
Pulled the K frame and bolted all the running gear and went back under
Custom made AC brackets, now just connecting everything up
I used modifies Torana style mounts ( 10mm lower engine) to provide enough clearance grow HEI dizzy and PCV
Edited by Muzza, 18 September 2025 - 01:07 PM.
Posted 19 September 2025 - 09:35 AM
Looks like a VB or late HZ engine with the longer head bolt bosses.
Posted 19 September 2025 - 10:04 AM
It looks great Muzza. Good to see you left the ports alone on the heads. A 253 with a mild cam won't perform if you start removing a lot of metal from them.
Posted 19 September 2025 - 03:49 PM
It looks great Muzza. Good to see you left the ports alone on the heads. A 253 with a mild cam won't perform if you start removing a lot of metal from them.
Yep just a very small amount on the floor of the intake and exhaust and casting dags particularly around the the valve stems, they were very bad
i did back cut the intake valves for better mid cam lift flow
Posted 20 September 2025 - 02:30 PM
Looks like a VB or late HZ engine with the longer head bolt bosses.
it’s late HZ. A ZR prefix
Posted 30 September 2025 - 01:05 PM
How'd you go about converting a 6 cyl bx to V8. I know there are several other posts covering this that talk about changing the input shaft, but seeing as you've actually just done it yourself, how'd you go about?
Posted 30 September 2025 - 01:14 PM
Edited by yel327, 30 September 2025 - 01:14 PM.
Posted 30 September 2025 - 03:31 PM
How'd you go about converting a 6 cyl bx to V8. I know there are several other posts covering this that talk about changing the input shaft, but seeing as you've actually just done it yourself, how'd you go about?
Loads of videos on Utube on D an A on the 4 speed
i did a rebuild , changed synco rings and fitted a v8 input shaft
Posted 30 September 2025 - 03:36 PM
So the engine is going, needs some tuning to get right
( 14btdc on timing, no ping)( bogs a little so I need to put a heavy spring in secondary)
but….. developed a big lifter tick at 50km of driving and sounds terrible
so off with covers and check out for cracked bridges, loose rockers etc, before I pull the valley
Posted 30 September 2025 - 04:14 PM
Pulled the drivers cover off, 1 rocker has a bout 2mm clearance, hence the noise, so lifter isn’t pumping up, it was when I started the engine as it was very quiet
so lifter come apart? Oil flowing from push rod hole, freely so no blockage
BTW crow lifters
Posted 30 September 2025 - 05:40 PM
Sounds like a lifter not working. Hopefully you haven't wiped the cam as well.
Posted 30 September 2025 - 06:21 PM
Sounds like a lifter not working. Hopefully you haven't wiped the cam as well.
Yep, it has a ton of oil flowing up,pushrod way more than the others
I will check cam it should be ok tho, very few K driven after lifter started to,play up
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