Need Help on a Stock Eliminator Motor Builder

Dwight Southerland · 03-23-2014, 09:33 AM

"Back in the day", Herman Chapman from CO built a '59 Chev 348-250 for SS. I'm not sure how much he campaigned the car, but it was reasonably competitive right out of the box.

Adrian, IMHO the 250 engine is worth considering over the 305. The camshaft specs are not significant with the current lifter-valve spring technology. You will have to determine if the difference in compression and the intake-carb is worth 55 hp. The AFB on the 305 will only flow around 575 cfm (unless you can get NHRA to allow an aftermarket Carter or Edelbrock replacement). Finding the preferred 3780540 intake is possibly an expensive endeavor unless you already have one. The more common 3770083 is easier to find, but it is PG only (if NHRA cares or anyone on NHRA's staff can figure that out).

03-23-2014, 09:33 AM	#20
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 2,001 Likes: 64 Liked 780 Times in 194 Posts	Re: Need Help on a Stock Eliminator Motor Builder "Back in the day", Herman Chapman from CO built a '59 Chev 348-250 for SS. I'm not sure how much he campaigned the car, but it was reasonably competitive right out of the box. Adrian, IMHO the 250 engine is worth considering over the 305. The camshaft specs are not significant with the current lifter-valve spring technology. You will have to determine if the difference in compression and the intake-carb is worth 55 hp. The AFB on the 305 will only flow around 575 cfm (unless you can get NHRA to allow an aftermarket Carter or Edelbrock replacement). Finding the preferred 3780540 intake is possibly an expensive endeavor unless you already have one. The more common 3770083 is easier to find, but it is PG only (if NHRA cares or anyone on NHRA's staff can figure that out).