4bbl/linkage questions

holley 390's are pretty nice. i ran one for years with great mpg and power.
when i converted to the 4bbl from the 2bbl i used the throttle cable holder and the return spring holder and bolted them to the end of my offy mainfold. it had the bosses like the stock manifolds to hold the intake and exhaust together.
lokar kits are good. took me about 20 minutes to install and adjust and hasnt given any problems yet.