You might need to space the pilot bearing back a 1/4" or so, otherwise with a manual trans, bolt the flywheel from Jerry W. up with the clutch and good to go.
For a PG/TH200/350/400/700 you need a spacer for the t/c snout and they are available now. Also have extra long dowel pins.
For the starter, use one of 2 ways:
- modify the bell housing to clear the starter nose like Gary Hart did on the GMC. If you do this then you can use the stock starter.
or
- purchase the starter adapter from Steve Pohill that bolts onto a tilton starter - this is the no cut/weld solution.
I'm using this adapter with the tilton starter and it works well.
The 4200 is about 180 to 200# lighter then a 250 and I'm guess here 250 # lighter then the 235/261. No idea how heavy a 270/302 jimmy is..
The pre '06 engines are 275 HP SAE net and with a little bit of work with a good tune you can get another 15-20 HP out of them.
Even stock its doubling the power of the 235 and then some.
Not done yet are the frame side engine mounts.
If truck has a stock frame under it - then the stock pan needs a minor tweak to work or notch the cross member. Have a look at Gary's pan.
Last edited by efi-diy; 03/01/2014 10:39 PM.
