View Single Post
  #19  
Old 07-08-2020, 11:48 AM
455firebird1969's Avatar
455firebird1969 455firebird1969 is offline
Ultimate Warrior
 
Join Date: Apr 2004
Location: NC
Posts: 2,650
Default

I kinda got a little side tracked in 2018, and stepped away from Drag Racing my Pontiac. My race car hasn’t left the trailer, nor the engine run since, but I am slowly finding my way back into racing my Pontiac. I bought a 1985 CJ-7 In 2019 because I had bought a new one in 1986, and decided I wanted another one. They ride like a little tank, are very basic 4x4 machines, but they are fun to drive. That’s when I decided to build the little 4.7 stroker motor for it. Like Mike said, It’s easy to build a stroker. Mopar didn’t change the inline six much when they bought the AMC Jeep line in 1987, They increased the bore, decreased the stroke, added MPFI and continued manufacturing them for about 15 years, so there are tons of them to be found. If you put a 258 crank in a .060 over 4.0, you end up with a 4.7, like mine.

That color is AMC blue, almost as pretty as Pontiac blue.

Thanks John, I learn a little more each time I port heads, or “a head” in this case.

Sorry for sidetracking your thread, Poncho4554spd, But you can achieve the same results with a little effort, and Jim’s book. If you need any help PM me. You should be able to build a 500+ HP 461 with 6X heads, with tons of torque.

__________________
1969 Firebird, Tx3-455/468 machined by CVMS
E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid
850DP on E-85 by Eric Niefert/T2 1" plastic spacer
T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400
1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine)

https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be

1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine)